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Patent: 3,858,757
Issued: Jan. 7, 1975
Inventor: Richard H. Langdon Jr., Tarrytown, N.Y.
Assignee: Mechtronics Corp., Stamford, Conn.

Patent: 3,854,591
Issued: Dec. 17, 1974
Inventor: Richard D. Schuessler, Winnetka, Ill.

Patent: 3,852,901
Issued: Dec. 10, 1974
Inventors: John C. Woodle, Bloomfield Hills; Dennis J. Smith, Saint Clair Shores, both of Mich.
Assignee: Arlington Aluminum Co., Detroit, Mich.

Patent: 3,849,919
Issued: Nov. 26, 1974
Inventors: Elmer Gravelle, La Mirada; John J. Casparro, Canoga Park, both of Calif.
Assignee: Don Fedderson Productions, Studio City, Calif.
The invention provides a dynamic advertising display system wherein a large number of advertising signs can be sequentially displayed. The signs are stored in a magazine when not being displayed, and means for automatically shifting the signs from a stored position to a position for engagement with a drive mechanism are provided.

Patent: 3,848,745
Issued: Nov. 19, 1974
Inventor: John W. Smith, Kansas City, Mo.

Patent: 3,848,735
Issued: Nov. 19, 1974
Inventors: Paul D. McGee, Medinah; Dalton C. Ulmer, Schaumburg, both of Ill.
Assignee: Motorola Inc., Franklin Park, Ill.

Patent: 3,847,335
Issued: Nov. 12, 1974
Inventor: H. Cameron Ross, Audubon, Iowa

Patent: 3,847,282
Issued: Nov. 12, 1974
Inventors: Peter C. Collura, Los Altos, Calif.; Michael Alien Kipp, Glen Ridge, N.J.
Assignee: Container Corp. of America, Chicago

Patent: 3,847,285
Issued: Nov. 12, 1974
Inventors: Bernard Leprince, Bethesda, Md.

Patent: 3,844,230
Issued: Oct. 29, 1974
Inventors: Harold L. Hudson, Gregory G. Mt. Pleasant, and Robert K. Scherzer, all of Liverpool, N.Y.
Assignee: Gaylord Bros. Inc., Syracuse, N.Y.