Race stopwatch with plural displays and operating modes
Real-time, uninterrupted time-interval to voltage converter
Recreational timing apparatus
Redundant clock system utilizing nonsynchronous oscillators
Regatta timing watch
Regenerating power unit
Relative time interval measuring instrument
Relative timing precompensation of high-speed pulse signals for
Remote pager for chess competition
Resettable gravity timer
Resettable multiple timer
Resettable sandglass-type timing device which provides selective
Resuscitation assistive timer