Class 379: TELEPHONIC COMMUNICATIONS ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division
[Manual of Classification, Class Listing] [Classification Index] [USPTO Home Page]

Manual of U.S. Patent Classification
as of June 30, 2000


Class
379
TELEPHONIC COMMUNICATIONS


Class definitions may be accessed by clicking on the class title, above.
Subclass definitions may be accessed by clicking on the subclass number, below.

Patents classified in a subclass may be accessed by clicking on the " [Patents] " icon following the subclass number, below.

( please note that links to definitions and classified patents may not be available for some classes and subclasses )

For search strategies, please refer to the Classification Index Explanation of Data web page.

Simple Text Search Across All U.S. Patent Classes in the Manual of Classification (requires a JAVA-enabled web browser)

--------------------------------------------------------------

Subclass Title
ClassTitle ===> TELEPHONIC COMMUNICATIONS
1[Patents]DIAGNOSTIC TESTING, MALFUNCTION INDICATION, OR ELECTRICAL CONDITION MEASUREMENT
2[Patents] . Including fault responsive disconnection of tested component
3[Patents] . Of hybrid or echo suppressor or canceller
4[Patents] . Of repeater
5[Patents] . By loopback
6[Patents] . By analysis of injected tone signal
7[Patents] . For detection of eavesdropping device
8[Patents] . With blocking of normal usage
9[Patents] . Of centralized switching system
10[Patents] . . By automatic testing sequence (e.g., programmable, scanning)
11[Patents] . . . Routiner
12[Patents] . . With dedicated testing line or trunk
13[Patents] . . Of call timing or charging equiment
14[Patents] . . Of plural exchange network
15[Patents] . . Of automatic switching equipment
16[Patents] . . . Of switching path
17[Patents] . . . Of switching selector
18[Patents] . . . By use of call address signal
19[Patents] . . . Rapid manual connecting structure for test equipment
20[Patents] . . Of switchboard element condition (e.g., lamp)
21[Patents] . Using portable test set (e.g., handset type)
22[Patents] . Of trunk or long line
23[Patents] . . Of line signalling
24[Patents] . . Electrical parameter measurement (e.g., attenuation)
25[Patents] . . Conductor identification or location
26[Patents] . . Fault detection or location (e.g., continuity, leakage)
27[Patents] . Of subscriber loop or terminal
28[Patents] . . Of data transmission instrument
29[Patents] . . Terminal arrangement to enable remote testing (e.g., testing interface)
30[Patents] . . Loop impedance (e.g., resistance, capacitance)
31[Patents] . . Of line signalling generator (e.g., dial, tone code generator)
32[Patents] . Indication of nonstandard condition of telephone equipment
33[Patents] . . Alarm or emergency (e.g., cut line)
34[Patents]SERVICE MONITORING OR OBSERVATION
35[Patents] . Listening-in or eavesdropping type
36[Patents]FREE CALLING FROM PAYSTATION
37[Patents]EMERGENCY OR ALARM COMMUNICATIONS (E.G., WATCHMAN'S CIRCUIT)
38[Patents] . Personal monitoring (e.g., for the ill or infirm)
39[Patents] . Responsive to sensed nonsystem condition
40[Patents] . . Automatic dialing
41[Patents] . . Transmission of recorded audio message
42[Patents] . . Plural conditions
43[Patents] . . Fire
44[Patents] . . Intrusion
45[Patents] . Central office responsive to emergency call or alarm (e.g., "911", operator position display)
46[Patents] . Called line or station condition responsive (e.g., recall if busy)
47[Patents] . Plural alarms over single line
48[Patents] . Announcement or alarm received at terminal station (e.g., "butt-in", alarm)
49[Patents] . Central station with plural substations
50[Patents] . By pulse or digital signal
51[Patents] . With automatic dialing or transmission of recorded audio message
52[Patents]INCLUDING AID FOR HANDICAPPED USER (E.G., VISUAL, TACTILE, HEARING AID COUPLING)
55.1[Patents]HAVING NEAR FIELD LINK (E.G., CAPACITIVE, INDUCTIVE)
56.1[Patents]HAVING LIGHT WAVE OR ULTRASONIC LINK FOR SPEECH OR PAGING SIGNAL
56.2[Patents] . Including fiber optic link within telephone network
56.3[Patents] . Including infra-red link with landline telephone network
67.1[Patents]AUDIO MESSAGE STORAGE, RETRIEVAL, OR SYNTHESIS
68[Patents] . Dynamic audio signal recording or reproduction
69[Patents] . . Call originating
70[Patents] . . Call intercept or answering
71[Patents] . . . Consecutive use of recorded phrases or words to form message
72[Patents] . . . Sequential or repeated announcement during single call initiated cycle
73[Patents] . . . Plural record carrier channels
74[Patents] . . . Remote control over telephone line
75[Patents] . . . . Remote dictation
76[Patents] . . . . Announcement selection or replacement
77[Patents] . . . . Control by generated tone
78[Patents] . . . Acoustic coupling
79[Patents] . . . With specified call initiated cycle control circuitry
80[Patents] . . . . Voice signal presence responsive
81[Patents] . . . . Call termination responsive (e.g., hang-up)
82[Patents] . . . . Having specified call initiation (e.g., ringing) responsive circuitry
83[Patents] . . . . Structural detail of storage medium drive
84[Patents] . . . At switching facility (e.g., central office, switchboard)
85[Patents] . . Recording of telephone signal during normal operation
86[Patents] . . . Inductive pickup
87[Patents] . . Reproduced signal distributed over telephone line
88.01[Patents] . Voice activation or recognition
88.02[Patents] . . Voice verification (e.g., voice authorization, voiceprint, etc.)
88.03[Patents] . . Voice dialing
88.04[Patents] . . Voice controlled message management
88.05[Patents] . Multilingual system or operation
88.06[Patents] . . Language selection
88.07[Patents] . Digital signal processing (DSP)
88.08[Patents] . Message signal analysis
88.09[Patents] . . Statistical analysis (e.g., time, date, length of message, etc.)
88.1[Patents] . . Including data compression
88.11[Patents] . Display of message related information
88.12[Patents] . Indication or notification of message
88.13[Patents] . Multimedia system (e.g., voice output combined with fax, video, text, etc.)
88.14[Patents] . . Presentation format conversion
88.15[Patents] . . Pager activation
88.16[Patents] . Voice message synthesis
88.17[Patents] . Interaction with an external nontelephone network (e.g., Internet)
88.18[Patents] . Interacting voice message systems
88.19[Patents] . Call source identification
88.2[Patents] . . Automatic Number Identification (ANI)
88.21[Patents] . . Caller identification received at substation
88.22[Patents] . Message management
88.23[Patents] . . Controlled by subscriber or caller
88.24[Patents] . . . By generated tone
88.25[Patents] . . . Message storage in centralized location (e.g., central office, PBX, etc.)
88.26[Patents] . . . . Recording voice message from non subscriber caller
88.27[Patents] . . Separate storage for voice and control information
88.28[Patents] . . Solid state memory storage
90.01[Patents]TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE)
91.01[Patents] . Credit authorization
91.02[Patents] . . At switching station
92.01[Patents] . Polling
92.02[Patents] . . Televoting
92.03[Patents] . . Having central station equipment
92.04[Patents] . . Having subscriber station equipment
93.01[Patents] . Having transmission of a digital message signal over a telephone line
93.02[Patents] . . Access restricting
93.03[Patents] . . . Personal identification
93.04[Patents] . . . Two or more calls
93.05[Patents] . . Terminal interface circuitry
93.06[Patents] . . . Digital
93.07[Patents] . . . To plural lines or networks
93.08[Patents] . . Transmission scheme (e.g., compression/decompression, transmission rate)
93.09[Patents] . . Switching between different terminal types (e.g., voice/data switch)
93.11[Patents] . . . Among at least three terminal types
93.12[Patents] . . Sales, ordering, or banking system
93.13[Patents] . . Amusement (e.g., game, lottery)
93.14[Patents] . . Having switching station
93.15[Patents] . . . Having format conversion
93.17[Patents] . . Having station display
93.18[Patents] . . . Having tone code recognition for generating alphanumeric characters
93.19[Patents] . . . Having pressure or position sensitive surface (e.g., touch-screen, light pen)
93.21[Patents] . . . Having conferencing
93.22[Patents] . . . At pay station
93.23[Patents] . . . Having user information display (e.g., telephone number, name, address, etc.)
93.24[Patents] . . . Having electronic mail
93.25[Patents] . . . Having remote database (e.g., videotex system)
93.26[Patents] . . By voice frequency signal (e.g., tone code)
93.27[Patents] . . . Alphanumeric
93.28[Patents] . . . Modulated audio tone
93.29[Patents] . . . . Reconfigurable
93.31[Patents] . . . . Protocol
93.32[Patents] . . . . . Initial setup
93.33[Patents] . . . . . Having adjustable speed
93.34[Patents] . . . . . Having recognition and selection
93.35[Patents] . . . . Having call-waiting
93.36[Patents] . . . . Line powered
93.37[Patents] . . . Having acoustic link
100.01[Patents] . To produce visual-graphic copy (e.g., facsimile)
100.02[Patents] . . Having detachable device (e.g., detachable storage medium, scanner)
100.03[Patents] . . Usage system
100.04[Patents] . . Communication charge calculation
100.05[Patents] . . Monitoring
100.06[Patents] . . Communication status notification
100.07[Patents] . . Using mark sheet
100.08[Patents] . . Electronic mailbox
100.09[Patents] . . Relay system
100.11[Patents] . . From a library
100.12[Patents] . . Connection to plural networks or lines
100.13[Patents] . . Format conversion
100.14[Patents] . . Call signal generation (e.g., auto-dial)
100.15[Patents] . . Having switching to other communication modes
100.16[Patents] . . . Voice mode
100.17[Patents] . . Transmission scheme
101.01[Patents] . Audio program distribution
102.01[Patents] . Remote control
102.02[Patents] . . Communication device
102.03[Patents] . . . Entertainmemt appliance (e.g., TV, VCR, radio, etc.)
102.04[Patents] . . . Power source
102.05[Patents] . . Of heating, ventilation, air conditioner (e.g., HVAC)
102.06[Patents] . . Of physical entrance or exit lock
102.07[Patents] . . Having indication
106.01[Patents] . Remote indication over telephone line (e.g., telemetry)
106.02[Patents] . . Patient monitoring
106.03[Patents] . . Meter reading
106.04[Patents] . . . Having power supply circuitry
106.05[Patents] . . . Having ringing suppression
106.06[Patents] . . . Having time window
106.07[Patents] . . . Having interrogation signal
106.08[Patents] . . . Having line status detection
106.09[Patents] . . Ringing suppression
106.11[Patents] . . Interrogation signal
108.01[Patents] . Telegraphy
108.02[Patents] . . Over telephone line
110.01[Patents]COMPOSITE SUBSTATION OR TERMINAL (E.G., HAVING CALCULATOR, RADIO)
111[Patents]WITH USAGE MEASUREMENT (E.G., CALL OR TRAFFIC REGISTER)
112[Patents] . Computer or processor control
113[Patents] . . Call traffic recording
114[Patents] . Call charge metering or monitoring
115[Patents] . . Interexchange operations
116[Patents] . . . Hardcopy record generating
117[Patents] . . Of station on polystation or party line
118[Patents] . . . Identification of station
119[Patents] . . Hardcopy record generating (e.g., ticket printing)
120[Patents] . . . With line identification or class of service determination
121[Patents] . . At central office
122[Patents] . . . With display
123[Patents] . . . Paystation (e.g., escrow control)
124[Patents] . . . Pulse counting or accumulating (e.g., "message metering")
125[Patents] . . . . Local or zone
126[Patents] . . . . Automatic message accounting
127[Patents] . . . . . Having line identification (e.g., automatic number identification - "ANI")
128[Patents] . . . . Time of day controlled
129[Patents] . . . Manually set (e.g., key and lock)
130[Patents] . . At subscriber station
131[Patents] . . . Time controlled
132[Patents] . . . . Paystation (e.g., escrow control)
133[Patents] . Call traffic recording or monitoring
134[Patents] . . At central station
135[Patents] . . . With hardcopy record generation (e.g., ticket printing)
136[Patents] . . . With display
137[Patents] . . . Trunk usage (e.g., peg count)
138[Patents] . . . . All trunks busy metering
139[Patents] . . . Counting the number of completed connections
140[Patents] . . At subscriber
141[Patents] . . . Mechanical register
142[Patents]WITH CALLING NUMBER DISPLAY OR RECORDING AT CALLED SUBSTATION
143[Patents]WITH CHECK OPERATED CONTROL (E.G., PAYSTATION)
144[Patents] . Other than coin
145[Patents] . Fraud or interference prevention
146[Patents] . Coin signalling or control
147[Patents] . . Coin box audit or totalizer
148[Patents] . . Denomination
149[Patents] . . Post-pay coin collection
150[Patents] . . Coin disposition (i.e., return or collection)
151[Patents] . . . Upon connection to called station
152[Patents] . . . Magnet, electromagnet, or relay controlled from central office
153[Patents] . . . Paystation (e.g., controlled by refund key)
154[Patents] . At central office
155[Patents] . At terminal station (e.g., coin paystation)
156[Patents]MULTI-LINE OR KEY SUBSTATION SYSTEM WITH SELECTIVE SWITCHING AND CENTRAL SWITCHING OFFICE CONNECTION
157[Patents] . With special service
158[Patents] . . Conferencing
159[Patents] . With intercom system
160[Patents] . . With connection of intercom station to subscriber line
161[Patents] . With exclusion or priority feature (e.g., lockout or privacy)
162[Patents] . Detail of hold circuitry
163[Patents] . . Electronic
164[Patents] . Line status indication or call alerting
165[Patents] . Switching or supervision feature (e.g., common control, digital)
166[Patents] . Detail of line circuit or line card
167[Patents]PRIVATE (E.G., HOUSE OR INTERCOM) OR SINGLE LINE SYSTEM
168[Patents] . Lockout
169[Patents] . . Central power source
170[Patents] . With paging
171[Patents] . Having plural stations with selective calling (e.g., master)
172[Patents] . . With call addressing
173[Patents] . With call addressing
174[Patents] . Including body or apparel supported terminal (e.g., headgear)
175[Patents] . . For underwater use (e.g., in diver's suit)
176[Patents] . With central power source
177[Patents]POLYSTATION LINE SYSTEM (I.E., PARTY LINE)
178[Patents] . Revertive call
179[Patents] . Call alerting (e.g., ringing)
180[Patents] . . Full selective or tuned (e.g., harmonic)
181[Patents] . . Semi-selective (e.g., line side, polarized)
182[Patents] . Automatic or unattended
183[Patents] . . Station identification
184[Patents] . . Lockout
185[Patents] . Portable or mobile
186[Patents] . Central power source
187[Patents] . Connected to central office
188[Patents]CALL OR TERMINAL ACCESS ALARM OR CONTROL
189[Patents] . Fraud or improper use mitigating or indication (e.g., "blue box", "black box")
190[Patents] . Time out
191[Patents] . . At switching center
192[Patents] . . . Of call duration (e.g., conversation timer)
193[Patents] . . . Of specific equipment
194[Patents] . Lockout or double use signalling
195[Patents] . . In automatic system
196[Patents] . At switching center
197[Patents] . . Central office
198[Patents] . . PBX
199[Patents] . At substation
200[Patents] . . Restrictive dialing circuit
201[Patents]SPECIAL SERVICES
202[Patents] . Conferencing
203[Patents] . . Operator control
204[Patents] . . Subscriber control
205[Patents] . . . Conference initiation by single calling station
206[Patents] . . At substation
207[Patents] . At plural exchanges
208[Patents] . Priority override (e.g., butt-in)
209[Patents] . Repetitive call attempts (e.g., camp-on-busy, retry)
210[Patents] . Call diversion (e.g., call capture)
211[Patents] . . Call forwarding
212[Patents] . . Call transfer
213[Patents] . . Intercept (e.g., dead or changed number)
214[Patents] . . Secretarial or answering service
215[Patents] . Call waiting
216[Patents] . Abbreviated dialing or direct call (e.g., hot line)
217[Patents] . Audible paging
218[Patents] . Performed by operator (e.g., butt-in, busy verification)
219[Patents]PLURAL EXCHANGE NETWORK OR INTERCONNECTION
220[Patents] . With interexchange network routing
221[Patents] . . Alternate routing
222[Patents] . Toll center
223[Patents] . . With operator assistance
224[Patents] . Tandem switching center
225[Patents] . Multi-PBX interconnection
226[Patents] . Having a manual exchange
227[Patents] . . With an automatic exchange
228[Patents] . . . Having signalling to operator
229[Patents] . Interexchange signalling
230[Patents] . . Signalling path distinct from trunk (e.g., CCIS)
231[Patents] . . Central office-to-PBX signalling
232[Patents] . . . PBX trunk groups
233[Patents] . . . Direct inward dialing
234[Patents] . . PBX to central office signalling (e.g., direct outward dialing)
235[Patents] . . Voice frequency signalling over trunk
236[Patents] . . D.C. signalling over trunk
237[Patents] . . . Pulse or digital signalling
238[Patents] . . . . Having signalling repeater
239[Patents] . . . . Using register-sender
240[Patents] . . Interexchange trunk circuit
241[Patents] . . . Glare or simultaneous seizure mitigation
242[Patents]CENTRALIZED SWITCHING SYSTEM
243[Patents] . Class of service determination or transmission
244[Patents] . . In common control system
245[Patents] . Identification
246[Patents] . . Of line or trunk
247[Patents] . . . With display
248[Patents] . . . Using matrix
249[Patents] . . . For nuisance call mitigation
250[Patents] . Four-wire switching
251[Patents] . With generating of call associated substation signal
252[Patents] . . For alerting signal at called station (e.g., ringing)
253[Patents] . . . Electronic
254[Patents] . . . Associated with connector
255[Patents] . . . With interrupter
256[Patents] . . Having automatic or through ringing
257[Patents] . . For calling station (e.g., status or progress tones)
258[Patents] . Switching controlled in response to called station addressing signal
259[Patents] . . Including deflected electron beam switching device or mechanical or optical switching control (e.g., fluidic)
260[Patents] . . With operator position or completion of call (e.g., dial "O", semiautomatic)
261[Patents] . . . Operator controlled register-sender
262[Patents] . . . Call extension by operator
263[Patents] . . . . With call indicator or announcer
264[Patents] . . . . A to B operator
265[Patents] . . . Call distribution to operator
266[Patents] . . . . Call queuing
267[Patents] . . . Operator's console
268[Patents] . . Having shared or common switching control
269[Patents] . . . Distributed control
270[Patents] . . . In-stage or interstage scanning (e.g., link scanning)
271[Patents] . . . Having multistage switching
272[Patents] . . . . Path selection or routing
273[Patents] . . . . . Alternate routing
274[Patents] . . . . . . With busy or idle test
275[Patents] . . . . . Including marking circuit
276[Patents] . . . . . . End-to-end marking (e.g., self-seeking)
277[Patents] . . . . . With busy or idle test
278[Patents] . . . . Interstage junctor or "trunk"
279[Patents] . . . Control reliability (e.g., redundancy)
280[Patents] . . . Including registering or storing device for call address signal
281[Patents] . . . . Conversion between dial pulse and voice frequency signal
282[Patents] . . . . Voice frequency receiver
283[Patents] . . . . . Dual tone multifrequency (DTMF) receiver
284[Patents] . . . . With processor
285[Patents] . . . . With magnetic memory
286[Patents] . . . . Signal processing (e.g., dial pulse analysis)
287[Patents] . . . . Electronic
288[Patents] . . . . Register-sender
289[Patents] . . . Translator
290[Patents] . . . With time division of control or supervisory signals
291[Patents] . . . With detail of crosspoint switching structure (e.g., crossbar)
292[Patents] . . . . Electronic crosspoint (e.g., solid-state)
293[Patents] . . Having line finder
294[Patents] . . . Including electronic element (e.g., tube or semiconductor)
295[Patents] . . . Plural
296[Patents] . . With repeater
297[Patents] . . Having specified busy-idle test
298[Patents] . . Direct control
299[Patents] . . . Step-by-step system
300[Patents] . . . . Having plural wiper sets
301[Patents] . . . . Having potential control
302[Patents] . . . . Having rotary switch
303[Patents] . . . . Coordinate system (e.g., X-Y)
304[Patents] . . . All relay type
305[Patents] . . . Having motor-driven switch
306[Patents] . . With crosspoint switch detail
307[Patents] . . With power supply
308[Patents] . Switching apparatus for connecting calling line to operator's position
309[Patents] . . Call distribution or queuing
310[Patents] . Divided central (e.g., communication between switchboards)
311[Patents] . . Having signalling path feature
312[Patents] . Having multiple answering jacks for multiplied line
313[Patents] . Multiple section switchboard
314[Patents] . . Auxiliary (e.g., overflow)
315[Patents] . With line-signal control
316[Patents] . . Spring-jack cut-off
317[Patents] . . Relay cut-off
318[Patents] . . Central power source
319[Patents] . Single switchboard (e.g., cord circuit)
320[Patents] . . Switchboard circuit
321[Patents] . . . Connection to operator's terminal
322[Patents] . Power supply
323[Patents] . . Power to switching equipment
324[Patents] . . Central power source (e.g., common battery, line current feed)
325[Patents] . Structure of equipment
326[Patents] . . Wire or cable distribution
327[Patents] . . . Main or intermediate distribution frame
328[Patents] . . Equipment mounting or support
329[Patents] . . . Allowing movement of equipment (e.g., movable, modular)
330[Patents] . . Housing
331[Patents] . Having protective circuit
332[Patents] . Plug and socket
333[Patents]CONCENTRATOR OR TRUNK SELECTOR
334[Patents] . Concentrator-distributor pair (e.g., line concentrator)
335[Patents] . Using crossbar or crosspoint switching
336[Patents] . With magnet, electromagnet, or relay
337[Patents] . With busy-idle test (e.g., idle trunk finder)
338[Patents]REPEATER (E.G., VOICE FREQUENCY)
339[Patents] . With signal conversion (e.g., dial to DTMF, analog to PCM)
340[Patents] . Having line length compensation or equalization
341[Patents] . Pulse or tone repeater (e.g., electromechanical relay)
342[Patents] . . Electronic (e.g., logic circuitry)
343[Patents] . Controlled by a pilot or reference signal
344[Patents] . Component processes bidirectional signals
345[Patents] . . Including two-to-four wire conversion or hybrid circuit
346[Patents] . With frequency discriminator or negative impedance element
347[Patents] . With gain or attenuation control
348[Patents] . Transmission of power to distant repeater
349[Patents] . Having voice frequency transformer
350[Patents]SUPERVISORY OR CONTROL LINE SIGNALLING
351[Patents] . Signalling integrity protection (e.g., voice signal immunity)
352[Patents] . Substation originated
353[Patents] . . Conversion of signal form
354[Patents] . . With called number display
355[Patents] . . Repertory or abbreviated call signal generation
356[Patents] . . . With dynamic memory
357[Patents] . . . Insertable control element or circuitry (e.g., card)
358[Patents] . . . By motor driven dial rotating device
359[Patents] . . . Pulse signal generating (e.g., dialing)
360[Patents] . . Voice frequency band signalling (e.g., reed devices)
361[Patents] . . . Electronic (e.g., tone generator)
362[Patents] . . Pulse signal generator (e.g., rotary dial)
363[Patents] . . . Control of motor driven dial rotating device
364[Patents] . . . With nonrotary actuator (e.g., key or slide type)
365[Patents] . . . Specified switching contact (e.g., contact spring)
366[Patents] . . . With detail of dial return mechanism (e.g., driving spring, speed governor)
367[Patents] . . . Finger wheel or mechanical adjunct (e.g., finger stop)
368[Patents] . . Plural-switch number input device (e.g., keypad)
369[Patents] . . Detail of mounting of switch pad or dial
370[Patents] . . . In handset
371[Patents] . . Magneto signalling
372[Patents] . Signal reception at substation
373[Patents] . . Incoming call alerting (e.g., ringing)
374[Patents] . . . With music or audible message generation
375[Patents] . . . With electronic call sounder (e.g., tone "ringer")
376[Patents] . . . With visual indication of incoming call
377[Patents] . Using line or loop condition detection (e.g., line circuit)
378[Patents] . . With current controlling electromagnetic core device (e.g., Hall-effect device)
379[Patents] . . With optical link between line and switching system
380[Patents] . . By bridge circuit
381[Patents] . . Busy test or make busy
382[Patents] . . For ring trip or polarity reversal detection
383[Patents] . . Of plural lines
384[Patents] . . . By scanning
385[Patents] . . Relayless
386[Patents] . Signal receiver (e.g., tone decoder)
387[Patents]SUBSTATION OR TERMINAL CIRCUITRY
388[Patents] . For loudspeaking terminal
389[Patents] . . With circuitry for voice control of transmission direction
390[Patents] . . With amplification or attenuation level control
391[Patents] . Sidetone control or hybrid circuit (e.g., induction coil)
392[Patents] . . Suppression (e.g., antisidetone)
393[Patents] . Hold circuit
394[Patents] . Impedance matching or line equalizing
395[Patents] . Amplifying
396[Patents] . Visual signalling (e.g., lamp)
397[Patents] . Wire distribution
398[Patents]LINE EQUALIZATION OR IMPEDANCE MATCHING
399[Patents]SUBSCRIBER LINE OR TRANSMISSION LINE INTERFACE
400[Patents] . For line length compensation
401[Patents] . . Voltage boosting circuit
402[Patents] . Hybrid circuit
403[Patents] . . With adjustable balance circuit
404[Patents] . . . Automatic adjustment
405[Patents] . . Electronic noninductive
406[Patents] . Echo suppression, antisinging, or reverse path blocking
407[Patents] . . Disable or inhibit
408[Patents] . . Control by pilot frequency signal
409[Patents] . . Having variolosser or attenuator
410[Patents] . . Echo cancellation (e.g., phase opposition)
411[Patents] . . . Having transversal filter
412[Patents] . Protective circuit
413[Patents] . Power supply (e.g., battery feed)
414[Patents]TRANSMISSION LINE CONDITIONING
415[Patents] . Reactance neutralizing
416[Patents] . Interference suppression
417[Patents] . . Anticrosstalk
418[Patents]CALL SIGNAL GENERATING (E.G., RINGING OR TONE GENERATOR)
419[Patents]TERMINAL
420[Patents] . Having loudspeaking conversation capability (e.g., hands-free type or speakerphone)
421[Patents] . Having muting
422[Patents] . Switch or switch actuator structure
423[Patents] . . Line selection
424[Patents] . . Receiver or handset position responsive (e.g., hookswitch)
425[Patents] . . . With mechanism for latching hookswitch or plunger against motion
426[Patents] . . . Movable holder for receiver or handset
427[Patents] . . . Having plunger and lever linkage
428[Patents] . Housing or housing component
429[Patents] . . Having distinct circuitry support structure (e.g., circuit board)
430[Patents] . . Body supported (e.g., headgear)
431[Patents] . . Separate housings for earphone and microphone (e.g., candlestick type)
432[Patents] . . Loudspeaking set
433[Patents] . . Handset structure
434[Patents] . . Specified terminal configuration (e.g., novelty type)
435[Patents] . . Wall set or convertible type
436[Patents] . . Desk set
437[Patents] . . Protective structure
438[Patents] . . . Of cord or connector
439[Patents] . . . Antiseptic
440[Patents] . . Casing or enclosure, per se
441[Patents]TERMINAL ACCESSORY OR AUXILIARY EQUIPMENT
442[Patents] . With circuit connection to terminal
443[Patents] . Including coupler (e.g., inductive)
444[Patents] . . Acoustic
445[Patents] . Locking device
446[Patents] . Telephone receiver support
447[Patents] . Attachable to terminal housing
448[Patents] . . Hookswitch operator
449[Patents] . . Handset holder (e.g., shoulder rest)
450[Patents] . . Clips onto terminal structure
451[Patents] . Protective structure
452[Patents] . . Antiseptic, disinfecting, or disposable
453[Patents] . Hood or enclosure (e.g., booth)
454[Patents] . Support or stand
455[Patents] . . Handset holder
456[Patents] . Dialing tool
457[Patents]MISCELLANEOUS
**********************************
CROSS REFERENCE ART COLLECTIONS
*********************************
900[Patents]INTERNET (e.g., Internet phone, webphone, Internet-based telephony)
901[Patents]VIRTUAL NETWORKS OR VIRTUAL PRIVATE NETWORKS
902[Patents]AUTO-SWITCH FOR AN INCOMING VOICE DATA, OR FAX TELEPHONE CALL (E.G., COMP/ FAX/TEL)
903[Patents]PASSWORD
904[Patents]AUTO-CALLING
905[Patents]FAX MAIL
906[Patents]TOUCHTONE MESSAGE TRANSMISSION
907[Patents]SPEECH RECOGNITION VIA TELEPHONE SYSTEM OR COMPONENT
908[Patents] . MULTIMEDIA
909[Patents]ALTERNATIVES
910[Patents]BAR CODE OR OPTICAL CHARACTER READER WITH TELEPHONE
911[Patents]DISTINCTIVE RINGING
912[Patents]GEOGRAPHICALLY ADAPTIVE
913[Patents]PERSON LOCATOR OR PERSON-SPECIFIC
914[Patents]PROGRAMMABLE TELEPHONE COMPONENT
915[Patents] . "SOFT" KEY
916[Patents]TOUCH SCREEN ASSOCIATED WITH TELEPHONE SET
917[Patents]VOICE MENUS
*********************************
FOREIGN ART COLLECTIONS
*********************************
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collection listed below. These collections contain ONLY foreign patents or nonpatent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
FOR 100HAVING NEAR FIELD LINK (E.G., CAPACITIVE, INDUCTIVE) (379/55)
FOR 101HAVING ELECTROMAGNETIC LINK FOR SPEECH OR PAGING SIGNAL (E.G., LIGHT WAVE LINK) (379/56)
FOR 102 . Control of selectively responsive paging arrangement over telephone line (379/57)
FOR 112TELEPHONE LINE OR SYSTEM COMBINED WITH DIVERSE ELECTRICAL SYSTEM OR SIGNALLING (E.G., COMPOSITE) (379/90)
FOR 113 . Credit authorization (379/91)
FOR 114 . Polling (e.g., audience survey) (379/92)
FOR 115 . With transmission of a digital message signal over a telephone line (379/93)
FOR 116 . . Including switching station (379/94)
FOR 117 . . Access restricting (379/95)
FOR 118 . . Including terminal for display of digital information (379/96)
FOR 119 . . By voice frequency signal (e.g., tone code) (379/97)
FOR 120 . . . By modulated audio tone (379/98)
FOR 121 . . . Having acoustic link (379/99)
FOR 122 . To produce visual-graphic copy reproduction (e.g., facsimile) (379/100)
FOR 123 . Audio program distribution (379/101)
FOR 124 . Remote control (379/102)
FOR 125 . . Of entrance or exit lock (379/103)
FOR 126 . . With indication (379/104)
FOR 127 . . From terminal (379/105)
FOR 128 . Remote indication over telephone line (e.g., telemetry) (379/106)
FOR 129 . . Meter reading (379/107)
FOR 130 . Telegraphy (379/108)
FOR 131 . . Over telephone line (379/109)
FOR 132COMPOSITE SUBSTATION OR TERMINAL (E.G., HAVING CALCULATOR, RADIO) (379/110)
FOR 133WITH AUDIO MESSAGE STORAGE AND RETRIEVAL (379/67)
FOR 134 . Stored in digital form (379/88)
FOR 135 . . Subscriber control of central office message storage or retrieval (379/89)


Information Products Division -- Contacts

Questions regarding this report should be directed to:

U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231

tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov


[Top] [Manual of Classification, Class Listing] [Classification Index] [USPTO Home Page]

Last Modified: 6 October 2000