|
US2551951A
|
|
Railway switch
|
|
US2502571A
|
|
Snap-on egg beater
|
|
US2609619A
|
|
Railroad track skeletonizing machine
|
|
US2115990A
|
|
Phototyping machine
|
|
US2075201A
|
|
Line spacing machine
|
|
US2201776A
|
|
Typing machine
|
|
US2035892A
|
|
Printing frame
|
|
US2026836A
|
|
Negative holder
|
|
US2033469A
|
|
Whirler for printing plates
|
|
US1967442A
|
|
Adjustable counter-weight
|
|
US2043543A
|
|
Offset proof press mechanism
|
|
US1965380A
|
|
Mechanical movement
|
|
US1907072A
|
|
Combined motor and manual adjusting means for photoprinting frames
|
|
US1959789A
|
|
Photomechanical printing machine
|
|
US1920400A
|
|
Means for making registered prints
|
|
US2000520A
|
|
Apparatus for securing registration position of an article
|
|
US1831389A
|
|
Printing frame and stand
|
|
US1793698A
|
|
Camera
|
|
US1789367A
|
|
Photomechanical machine
|
|
US1920399A
|
|
Photo-composing machine
|
