|
US2137548A
|
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Light measuring device
|
|
US2057930A
|
|
Vehicle steering mechanism
|
|
US2054995A
|
|
Bridge tower construction
|
|
US2060402A
|
|
Combined truck and supporting mechanism for aerial cars
|
|
US2043452A
|
|
Combined cofferdam and pier fender construction method
|
|
US2046661A
|
|
Gear and rack meshing mechanism
|
|
US2047601A
|
|
Lift bridge
|
|
US2052116A
|
|
Hydraulic scale
|
|
US2024400A
|
|
Hydraulic cell
|
|
US2030479A
|
|
Recording mechanism
|
|
US1991584A
|
|
Illuminating means for highways and sidewalks
|
|
US1981206A
|
|
Highway path indicator
|
|
US1929859A
|
|
Photo-electric cell controls for highway barriers
|
|
US1945124A
|
|
Unit building construction
|
|
US1929858A
|
|
Air spring operating means
|
|
US1967381A
|
|
Bridge
|
|
US1929857A
|
|
Auto pneumatic spring for vehicles
|
|
US1967380A
|
|
Overhead crossing signal
|
|
US2001162A
|
|
System of building construction
|
|
US2097900A
|
|
Automatic road direction sign
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