|
US3311860A
|
|
Infinitely variable multi-turn potentiometer
|
|
US3203233A
|
|
Self-centering means for rotating shaft
|
|
US3203521A
|
|
High speed magnetic clutch means
|
|
US3102195A
|
|
Pickup means for punched data
|
|
US3007602A
|
|
Instrument cover means
|
|
US3027495A
|
|
Photoelectric switch means
|
|
US3057209A
|
|
Seismic vibration pickup means
|
|
US2900520A
|
|
Light sensitive control means
|
|
US3017768A
|
|
Vibration pickup means
|
|
US2975640A
|
|
Dynamic balancing means
|
|
US2857764A
|
|
Rotor balance testing machine
|
|
US2754434A
|
|
Magnetic pickup means
|
|
US2756349A
|
|
Light integrating means for photocell circuit
|
|
GB756352A
|
|
Improvements in automatic street lighting systems
|
|
US2748223A
|
|
Thermostatic control means
|
