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

Class
368
HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

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

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

Subclass		Title
ClassTitle		===> HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES
1		CONTROLLED BY A DISPARATE DEVICE
2		. Speed checker
3		. Game
4		. Telephone
5		. Engine (e.g., internal combustion)
6		. Vehicle (e.g., aircraft, automobile) or vehicle part
7		. . Actuation of a parking meter
8		. . Actuation of a running-time meter
9		. Electrical device
10		COMBINED WITH DISPARATE DEVICE
11		. Ambient condition detector
12		. External alarm
13		. Telephone
14		. Navigational instrument
15		ASTRONOMICAL
16		. With sun, earth, and moon display
17		. With sun and earth display
18		. With moon and earth display
19		. With tide display
20		. With navigational display
21		PLURAL TIME ZONES
22		. With manually actuated display
23		. With a world globe
24		. . Including illumination means
25		. With movable belt display
26		. With movable drum display
27		. With movable disk display
28		WITH CALENDAR INDICATOR
29		. Electro-optical
30		. . Liquid crystal display (i.e., LCD)
31		. Winding and setting
32		. . Having clutch coupling
33		. Winding
34		. Setting or resetting
35		. . Movable ring or disk
36		. . . With clutch
37		. Movable ring or disk
38		. . With jumper spring
39		. Movable drum
40		. Movable belt
41		WITH MEMORANDUM HOLDER OR ERASABLE WRITING SURFACE
42		. Motion controlled by timepiece
43		. Having alarm controlled by holder
44		. Having pointer controlled by timepiece
45		TOY
46		PLURAL TIMEPIECE SYSTEM OR SYSTEM DEVICE (E.G., PRIMARY OR SECONDARY CLOCKS)
47		. With wireless synchronization
48		. With auxiliary power source
49		. With significant winding or setting means
50		. . For winding only
51		. . For setting only
52		. Primary with direct synchronization or drive
53		. . By external condition responsive means
54		. . By fluidic actuation means
55		. . By communication means
56		. . By signal frequency change
57		. . By signal amplitude change
58		. . By signal polarity change
59		. Secondary
60		. . With mechanical or electromechanical resetting
61		. . . Having mechanically actuated electrical switch
62		CHRONOLOGICAL
63		. Phonetic (e.g., talking clock)
64		. With supplemental power source
65		. With fluidic actuation means
66		. With power monitor
67		. With auxiliary illumination for display
68		. With intensity control of display
69		. With manually actuated display
70		. . Operated sequentially for distinct time data
71		. With simultaneous time indicating means
72		. . Alarm type
73		. . . Actuated by electrical means
74		. . . With significant winding or setting
75		. . Sequential hourly sounding means
76		. With mechanical or electromechanical driven display
77		. . Rotating disk
78		. . Drum
79		. . Optical
80		. . Hand and dial
81		. . . Having motor located in hand
82		. With electro-optical display
83		. . Solid body light emitter (e.g., LED)
84		. . Liquid crystal display (i.e., LCD)
85		. With pulse transforming means
86		. . Including transistor
87		. . . Integrated circuit
88		. With significant casing or mounting support structure
89		TIME INTERVAL
90		. Parking meter type
91		. . With gravity-actuated timer
92		. . With overtime indicator
93		. Gravity actuated type (e.g., hourglass)
94		. . With alarm means
95		. . With special support means
96		. With alternately operating indicators (e.g., chess clock)
97		. With predetermined mechanical timing means
98		. . Including alarm means
99		. . . With combined alarm and time motor
100		. . . With cam-controlled striker
101		. Mechanical stop time type
102		. . With plural second hands (e.g., split-seconds)
103		. . With pivoted coupler
104		. . With sliding coupler
105		. . With positive stop
106		. . With reset means
107		. Electrical or electromechanical
108		. . For predetermined interval
109		. . . Including alarm means
110		. . Mechanically actuated stop time type
111		. . . With electronic memory storage
112		. . . With reset means
113		. . Stop time type
114		. . . With physically changeable element
115		. . . Including cathode-ray tube oscilloscope
116		. . . . With brightner means
117		. . . . With variable delay means
118		. . . Including time base oscillator
119		. . . . Plural
120		. . . Including delay means
121		. . . Including time indicating means actuated by voltage or electrical charge
122		. . . . With null indicator having variable circuit element
123		. . . . With vacuum-tube voltmeter
124		ESCAPEMENTS
125		. With oscillating or reciprocating means
126		. . Magnetic type
127		. . Balance wheel type
128		. . . With motion conversion drive
129		. . . Carrying impulse receiving means
130		. . . . On balance shaft
131		. . . . . With pallet lock
132		. . . With levers
133		. . . . In straight-line configuration
134		. . Pendulum type
135		. . . With motion conversion drive
136		. . . With gravity actuation
137		. . . With beat adjuster
138		. . . . Having a verge
139		MECHANICAL TIME BASE
140		. Mainspring
141		. . With protection means
142		. . With mainwheel on barrel
143		. . With mainwheel on arbor
144		. . With attachment means for spring
145		. . With winding and setting
146		. . . Stem
147		. . With winding
148		. . . Self
149		. . . . Electric
150		. . . . . Weight controlled
151		. . . . Spring
152		. . . Gravity
153		. . . Case controlled
154		. . With spring click
155		ELECTRICAL TIME BASE
156		. Solid state oscillating circuit type
157		. . For reciprocating or oscillating element
158		. . . Balance wheel type
159		. . . Crystal
160		. For reciprocating or oscillating element
161		. . Balance wheel type
162		. . . With coil
163		. . . With magnet
164		. . . With opening and closing of contacts
165		. . Pendulum
166		. . . With drive means control
167		. . Tuning fork
168		OSCILLATING OR RECIPROCATING MEANS
169		. Balance wheel type
170		. . With regulation
171		. . . By compensation
172		. . . By rack and pinion
173		. . . By screw
174		. . . . With spring bias
175		. . . By hairspring
176		. . . . With curb pins
177		. . . . With collet
178		. . . . With stud
179		. Pendulum type
180		. . Torsion
181		. . With regulation
182		. . . By thermal compensation
183		. . With lock
184		REGULATING MEANS
185		. For setting
186		. . With rate regulation
187		. . By electrical device actuation
188		. . . With single actuation and plural pulses
189		. . . With pulse blocking means
190		. . By winding means (e.g., stem)
191		. . . Having a clutch
192		. . . . With lever engagement
193		. . . . . Coupling
194		. . . . . . To notch in stem
195		. . . . . . . With coupling spring biased
196		. . . Having a movable plate
197		. . . . With double gear
198		. . . . . Cam engagement
199		. . . . . Lever engagement
200		. For adjusting the frequency or beat
201		. . Of frequency divider
202		. For compensation
203		POWER SUPPLY DETAILS
204		. Electrical
205		. . Solar cell
206		WINDING MEANS
207		. Self
208		. . Inertia
209		. With overwind prevention
210		. With condition indicator
211		. . Audio
212		. . Pointer and scale
213		. For cranked lever
214		. Key
215		. Rim
216		. Stem
217		PULSE TRANSFORMING MEANS
218		. With transistor
219		. . Field-effect transistor
220		DISPLAY TRAINS
221		. For rotatable disk dial type
222		. For drum or plate dial type
223		DISPLAYS OR DISPLAY DEVICE DETAILS
224		. With manual activation
225		. . By motion or position
226		. With luminous material
227		. With auxiliary illumination for display
228		. Dial or hand
229		. . With animation (e.g., motion clock)
230		. . For tactile time perception (e.g., braille clock)
231		. . With time indicia shifting means
232		. . Including dial details only
233		. . . Of rotatable disk type
234		. . . Translucent
235		. . . Of drum or plate type
236		. . . Of dial fasteners
237		. . . . Screw
238		. . Including hand details only
239		. Optical
240		. . With circular pattern of light sources
241		. . With solid body light emitter (e.g., LED)
242		. . With liquid crystal display (i.e., LCD)
243		SIGNALLING MEANS
244		. Time condition responsive (i.e., alarm)
245		. . With variable loudness or tone
246		. . With same day plural time selection
247		. . For more than one day (e.g., eight-day clock)
248		. . With automatic repetition over short interval
249		. . With signal condition indicator
250		. . Electrical
251		. . . With electronic memory storage
252		. . . With contact on a circle
253		. . . With contact on a hand
254		. . . With cam control
255		. . . With piezoelectric means
256		. . . With optical signal
257		. . . With mechanical let-off
258		. . . . Having alarm winding arbor
259		. . . With combined alarm and time motor
260		. . With combined alarm and time motor
261		. . Plural
262		. . With shutoff
263		. . . For short period
264		. . . Having spring wind release
265		. . With let-off
266		. . . Setting
267		. Repeat
268		. . Double snail
269		. Cam controlled
270		. . Snail
271		. . Pin
272		. Musical (e.g., "cuckoo-clock")
273		. . Chimes
274		. Recorded
275		. With deactivation during setting
276		CASES
277		. Adaptable
278		. Combined with disparate device
279		. . Ring
280		. Of particular material
281		. Wrist worn
282		. . With band or bracelet details
283		. . With a cover
284		. With tubular shape
285		. With ornamentation
286		. With protection means
287		. . Shock absorbing
288		. . For crown or stem
289		. . . By waterproofing
290		. . . . Push-button stem type
291		. . Waterproofing
292		. . . Noncircular-type case
293		. . Antimagnetic shielding
294		. With bezel or crystal details
295		. . Of bezel only
296		. . Of crystal only
297		. With details of center
298		. . Integral to front or back
299		. With movement ring details
300		. With movement securing means
301		. With pendant details
302		. . Bow
303		. . . Fastener
304		. . . . Pin or screw
305		. . . . Sleeve
306		. . Crown or stem
307		. . . Fastener
308		. With crown or stem details
309		. With front or back details
310		. . Of screw-threading to case center
311		. . Of opening spring
312		. . . Cover connection
313		. . Of hinge connection
314		. With dial or sash securing means
315		. With alarm or striking attachment
316		. With support details
317		. . Base
318		PLATE DETAILS
319		CROWN OR STEM DETAILS
320		. Switch or detent
321		. . Electrical
322		ARBOR AND PINION DETAILS
323		CANNON PINION DETAILS
324		STAFF AND BEARING DETAILS
325		. Balance
326		. . For protection (e.g., shock absorbing)
327		MISCELLANEOUS

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Questions regarding this report should be directed to:

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Information Products Division
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tel: (703) 306-2600
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Last Modified: 6 October 2000