|
US1996339A
|
|
Chronometric tachometer
|
|
US1866660A
|
|
Pressure indicator
|
|
US1960745A
|
|
Measuring instrument
|
|
US1953244A
|
|
Method and apparatus for the detection of combustion vapors
|
|
US2124072A
|
|
Indicating instrument
|
|
US1918188A
|
|
Altimeter temperature correction computer
|
|
US1939559A
|
|
Manometer
|
|
US1804698A
|
|
Pressure gauge
|
|
US1583984A
|
|
Chronometric indicating instrument
|
|
US1693485A
|
|
Mechanical differential movement and tachometer embodiment
|
|
US1639229A
|
|
Latitude indicator for aircraft
|
|
US1772152A
|
|
Impulse tachometer
|
|
US1610559A
|
|
Tachometer
|
|
US1749494A
|
|
Sensitive altimeter
|
|
US1631746A
|
|
Flow meter
|
|
US1562351A
|
|
Tachometer
|
|
US1562350A
|
|
Nonfogging, nonfrosting double-lens goggles
|
|
US1427829A
|
|
Flexible transmitting device
|
