|
US2426800A
|
|
Dial mounting for electrical measuring instruments
|
|
US2367449A
|
|
Shock mounting instrument
|
|
US2352576A
|
|
Battery clip
|
|
US2217925A
|
|
Radio tube tester
|
|
US2214209A
|
|
Dial lighting
|
|
US2180487A
|
|
Detachable rectifier plug
|
|
US2168720A
|
|
Illuminating instrument dial
|
|
US1963284A
|
|
Portable electrical measuring instrument
|
|
US2038862A
|
|
Cable plug and latch holding the adapter
|
|
US2033405A
|
|
Radio tube socket
|
|
US2007989A
|
|
Audion tube tester
|
|
US2001945A
|
|
Audion tube tester
|
|
US2054642A
|
|
Electrical testing instrument
|
|
US1918940A
|
|
Electrical measuring instrument
|
