|
US4142680A
|
|
High resolution timing recording system
|
|
US3946312A
|
|
Timing apparatus and system
|
|
US3238895A
|
|
Film carrier system
|
|
US3237830A
|
|
Roller drive for developing unit
|
|
US3278819A
|
|
Motion picture projector speed control
|
|
US3295427A
|
|
Film magazine
|
|
US3217098A
|
|
Method of policing horse races
|
|
US2978991A
|
|
Cable retainer on suspended film carrier
|
|
US2708616A
|
|
Method and apparatus for determination of racetrack finish line and lanes
|
|
US2677305A
|
|
Means of photographing racing events
|
|
US2739866A
|
|
Method and apparatus for photographing races or the like
|
