|
US1744375A
|
|
Alternating-current bell
|
|
US1771949A
|
|
Hose fitting
|
|
US1777924A
|
|
Telephone appliance
|
|
GB204546A
|
|
Improvements in and relating to radio telephonic receivers
|
|
US1560779A
|
|
Radio loud-speaking receiver
|
|
US1654971A
|
|
General-alarm system for battleships
|
|
US1429133A
|
|
Electric-switch casing
|
|
US1420801A
|
|
Rotary annunciator
|
|
US1405812A
|
|
Annunciator drop
|
|
US1439817A
|
|
Annunciator drop
|
|
US1331134A
|
|
Electric bell
|
|
US1396803A
|
|
Electric indicator
|
|
US1400199A
|
|
Indicating mechanism
|
|
US1408555A
|
|
Art of producing step-by-step movements
|
|
US1225913A
|
|
Rudder control.
|
|
US1216533A
|
|
Electrical telegraph and indicator system.
|
|
US1220484A
|
|
Centrally-controlled general-alarm system.
|
|
US1232745A
|
|
Warning-signal system.
|
|
US1111345A
|
|
Signal apparatus.
|
|
US1197001A
|
|
Turret telltale indicator.
|
