US PATENT SUBCLASS 368 / 89
TIME INTERVAL

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

89TIME INTERVAL {6}
90  DF  .~> Parking meter type {2}
93  DF  .~> Gravity actuated type (e.g., hourglass) {2}
96  DF  .~> With alternately operating indicators (e.g., chess clock)
97  DF  .~> With predetermined mechanical timing means {1}
101  DF  .~> Mechanical stop time type {5}
107  DF  .~> Electrical or electromechanical {3}

DEFINITION

Classification: 368/89

TIME INTERVAL:

(under the class definition) Subject matter wherein means is provided for indicating the time of duration of a particular event or upon termination of a predetermined time period.

SEE OR SEARCH THIS CLASS, SUBCLASS:

62, for chronological timepieces.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

1+, for miscellaneous discriminating circuits.

364, Electrical Computers and Data Processing Systems,

528.41, for control based on an elapsed time. 377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems, for pulse counters and pulse counting systems, especially

20, for pulse counters used for measuring time combined with measurement of another parameter.

702, Data Processing: Measuring, Calibrating, or Testing,

176+, for data processing in a time duration or rate measurement system.

708, Electrical Computers: Arithmetic Processing and Calculating,

111+, for computational digital watches.