US PATENT SUBCLASS 352 / 168
.~ Having plural or interchangeable drives

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

166  DF  CAMERA AND/OR PROJECTOR DRIVE MECHANISMS {14}
168.~ Having plural or interchangeable drives

DEFINITION

Classification: 352/168

(under subclass 166) Subject matter having more than one source of motive power, either contained within the device or substitutable for one another.