1
Castedello William: Cassette for a sound slide projector. The Kalart Company, August 22, 1972: US3685893 (6 worldwide citation)

A cassette for a sound slide projector has in a casing a first compartment and a second compartment. The first compartment accommodates a tape holding mechanism and is accessible through recesses for forward winding and rewinding of the tape and for recording a message on the tape or playing back su ...


2
Wakeman Alfred W: Cassette for a sound slide projector. Kalart Victor Corporation, Hane Baxley and Spiecens, January 21, 1975: US3861795

A cassette for a sound slide projector has in a casing a first compartment and a second compartment. The first compartment accommodates a tape reel mechanism and is accessible through recesses for forward winding and rewinding of the tape and for recording a message on the tape or playing back such ...