|
US1663712A
|
|
Wave signaling system
|
|
US1834408A
|
|
Electric signaling
|
|
US1791965A
|
|
Coupling arrangement
|
|
US1631213A
|
|
Electrical system
|
|
US1650947A
|
|
Dynamo-electric machine
|
|
US1612448A
|
|
Electrical signaling system and method
|
|
US1600828A
|
|
Magnetic amplifier
|
|
US1607467A
|
|
High-power thermionic valve
|
|
US1663135A
|
|
Static frequency multiplier and modulator
|
|
US1687253A
|
|
Negative impedance device
|
|
US1602439A
|
|
Electromagnetic-wave-generating system
|
|
US1673009A
|
|
Antenna-circuit arrangement
|
|
US1600827A
|
|
Speed regulator for high-frequency alternators
|
|
US1640002A
|
|
Speed regulator for high-frequency generating sets
|
|
US1687298A
|
|
Electric coil construction
|
|
US1658488A
|
|
High-frequency alternator
|
|
US1545502A
|
|
Radiotelephony
|
|
US1630346A
|
|
Amplifier for electrically-disturbed telephone lines
|
|
US1625125A
|
|
Electrical conductor
|
|
US1601313A
|
|
Vacuum-tube relay
|
