Offset pallet lever for watch escapement
On demand useful life indicator
Operating switch and retainer for digital watch cases
Operation and maintenance of clock distribution networks...
Operational timer circuit for monitoring a motor under load
Operational timer circuit for monitoring a motor under load
Optical display assemblage
Optical pumping atomic frequency standard
Opto-electronic display device
Oscillatory or reciprocating motion to rotary motion...
Oscillatory or reciprocatory motion to rotary motion...