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Class Information
Number: 968/839
Name: Horology > Apparatus for measuring unknown time intervals by electromechanical means [g04f 8/00] > Running only during the time intervals to be measured, e.g., stopwatch, etc. [g04f 8/00c]
Description:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4681463 |
Differential timer |
Jul. 21, 1987 |
| 4588305 |
Electronic chronograph watch having analog and digital display of measured time periods |
May. 13, 1986 |
| 4540291 |
Horology module comprising an electronic circuit and a calendar device |
Sep. 10, 1985 |
| 4537514 |
Multi-function analog display stopwatch |
Aug. 27, 1985 |
| 4364669 |
Chronographic watch |
Dec. 21, 1982 |
| 4270197 |
Analog display electronic stopwatch |
May. 26, 1981 |
| 4207733 |
Elapsed time indicator |
Jun. 17, 1980 |
| 4075829 |
Self-contained miniature timer |
Feb. 28, 1978 |
| 4062180 |
Electronic chess clock |
Dec. 13, 1977 |
| 4059954 |
Laboratory clock |
Nov. 29, 1977 |
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