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Apparatus for sensing vehicles
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Patent number 5,850,192
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Issue date Dec 15, 1998
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Minnesota Mining and Manufacturing Company
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Frederick J. Turk
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G08 - SIGNALLING
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Cartridge door-latching mechanism
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Patent number 4,744,530
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Issue date May 17, 1988
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Minnesota Mining and Manufacturing Company
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Claude E. Cybulski
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G11 - INFORMATION STORAGE
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Tripod cassette positioning
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Patent number 4,607,303
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Issue date Aug 19, 1986
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Minnesota Mining and Manufacturing Company
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Claude E. Cybulski
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G11 - INFORMATION STORAGE
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Automatic record-lockout mechanism
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Patent number 4,564,871
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Issue date Jan 14, 1986
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Minnesota Mining and Manufacturing Company
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Claude E. Cybulski
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G11 - INFORMATION STORAGE
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Videocassette wear button
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Patent number 4,564,156
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Issue date Jan 14, 1986
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Minnesota Mining and Manufacturing Company
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Claude E. Cybulski
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G11 - INFORMATION STORAGE