Class 178: TELEGRAPHY ( Manual of U.S. Patent Classification )

U.S. PATENT AND TRADEMARK OFFICE
Information Products Division

[Manual of Classification, Class Listing]

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

Class
178
TELEGRAPHY

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		===> TELEGRAPHY

1		MISCELLANEOUS
2R		SYSTEMS
3		. Automatic
4		. . Printing
4.1R		. . . Remote control
4.1A		. . . . Radio-controlled
4.1B		. . . . Called station identification answer back system
4.1C		. . . . Revertive signaling
15		. . Photographic recorder
16		. . Current reversing
17R		. . Transmitters or recorders
17.5		. . . Storing
17A		. . . Tape and/or keyboard
17B		. . . Tape control
17C		. . . Keyboard
17D		. . . Light, capacity, pneumatic sensing
17E		. . . Overlap
18.01		. Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)
18.02		. . Error correction
18.03		. . Writing digitizer pad
18.04		. . . Acoustical (e.g., vibration, ultrasonic, etc.)
18.05		. . . Resistive
18.06		. . . Capacitive
18.07		. . . Inductive
18.08		. . . . Having shield
18.09		. . . Optical
18.11		. . . With illumination
19.01		. . Writing digitizer stylus
19.02		. . . Acoustical stylus
19.03		. . . Capacitive or inductive stylus
19.04		. . . Pressure stylus
19.05		. . . Light pen
19.06		. . . AC source
19.07		. . . . Multifrequency
20.01		. . Writing digitizer circuit
20.02		. . . Electrical filter or multiplexer
20.03		. . . Sampling circuit
20.04		. . . Phase detecting
21		. Stenographic
23R		. Printing
24		. . Bulletin
25		. . Page
26.1		. . . Translators
27		. . . Selectors
28		. . . With type-wheel recorder
29		. . . . Recorders
30		. . Character elements
31		. . Multiple-line circuit
32		. . . With type-wheel recorder
33R		. . Selectors
34		. . . With type-wheel recorder
33MP		. . . Monopulse
33A		. . . Double selectors
35		. . With type-wheel recorder
36		. . Recorders
37		. . . Privacy (e.g., mechanical packaging or covering of printed message)
38		. . . With type wheel
39		. . . . Multiple
40		. . . . . Shifting devices
41		. . . . Unisons
42		. . . Paper guiding or feeding
23A		. . Error detection in printers
43		. Space induction
45		. Loaded circuit
46		. . Loading coils
47		. Harmonic or reed
48		. . Recorders and receivers
49		. Superposed current
62		. Chemical
63R		. Cable or capacity
63A		. . Cable repeaters
63B		. . Cable transmitters
63C		. . Cable receivers
63D		. . Cable mechanical structure
63E		. . Distortion correction and artificial lines
63F		. . Direction reversing
64		. Coil transformer
65		. Dynamo
66.1		. Alternating or pulsating current
116		. . Spark gap or arc discharge
117		. . Coherer
66.2		. . Transmitter keying
67.1		. . Modified semicycle
69R		. Line-clearing and circuit maintenance
69M		. . Frequency measuring and compensating
69N		. . Precorrectors
69A		. . Distortion measuring
69B		. . Interference neutralizing
69C		. . Balancing duplex cables
69D		. . Zero wander neutralizers
69E		. . Leakage compensation
69F		. . Neutralizing line capactive discharge
69G		. . Monitoring, alarm and pilot signals
69H		. . Reiterative
69K		. . Misc. gas-filled tube circuits
69L		. . Check back
69.6		. Call
2A		. Simplex-reversing periodic
2B		. Code changers
2C		. Way stations; party lines
2D		. Round robins
2E		. Satellite
2F		. Coin-controlled, connecting, recording
70R		REPEATERS
71.1		. Automatic in either direction
72		. . Mechanical circuit retainer
73		. . Multiple line
71.2		. . Distributor
71.3		. . Mechanical
71.4		. . Generator
71.5		. . Artificial line and relay
71.6		. . Vacuum tube and gas magnetron
71.7		. . Code transformer
71.8		. . Oscillatory
71.9		. . One-way repeater switched
71.11		. . Piezoelectric
71.12		. . Vacuum tube and relay
71.13		. . Relay only
71.14		. . Supervisory, alarm, monitor
70A		. Relays only
70B		. Vibrating relays
70C		. Rotary distributors
70D		. Mechanical
70E		. Tuning forks
70F		. Vacuum tubes
70G		. . With rotary distributors
70H		. Gas tubes
70K		. . And distributors
70M		. Magnetic
70N		. Magnetron repeaters
70P		. Photocell
70Q		. Piezoelectric
70J		. Generator
70S		. Having a carrier wave input
70T		. Oscillatory
70TS		. Using transistors
74		CIRCUITS
75		. Manipulating switch
76		. Retarded closer
77		COMBINED INSTRUMENTS
78		. Portable sets
79		CODE TRANSMITTERS
80		. Combined instruments
81		. . With typewriter
82R		. Automatic dot
82B		. . With electromagnet
82A		. . And dash
83		. Rotary contact
84		. . Drum
85		. Oscillating contact
86		. Reciprocating contact
118		RECEIVERS
89		. Code recorders
90		. . Photographic
91		. . Siphon
92		. . Indenting or perforating
93		. . Polarized
94		. . Pyrographic
95		. . Stop mechanisms
96		. . Inking devices
97		. . Double-tape movement
98		. Sounders
99.1		. . Private (e.g., acoustically shielded)
100		. . Augmenting
119		. Optical member
120		. With electron tube or solid-state device
101		KEYS
102		. Multiple contact
103		. Multiple line
104		. Self-closing
105		. Reversible
106		. Shifting contact point
107		. Knife-edge pivot
108		. Horizontal swing
109		. Spring pivot
110		. Finger buttons
111		TAPES
112		. Perforated
114		INSTRUMENT TABLES
115		LEARNERS' INSTRUMENTS
		*********************************
		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.
		SYSTEMS
FOR 100		. Writing (178/18)
FOR 101		. . Alternating current (178/19)
FOR 102		. . Variable direct current (178/20)
FOR 103		. Stylus and tablet (178/87)

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

Last Modified: 6 October 2000

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

Class 178 TELEGRAPHY

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

Class
178
TELEGRAPHY