SMITH ENGINEERING, A SOLE PROPRIETORSHIP

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5067079 Interactive audio baseball gameExpiredFeb 06, 89Nov 19, 91[A63F, G06F]
4786967 Interactive video apparatus with audio and video branchingExpiredAug 20, 86Nov 22, 88[H04N]
4462076 Video game cartridge recognition and security systemExpiredJun 04, 82Jul 24, 84[G06F]
D274631 Hand control unit for video arcade gameExpiredJan 06, 82Jul 10, 84[]
4408103 Joystick operated multiple position switchExpiredJan 06, 82Oct 04, 83[H01H]
4398086 Game-calculator having sliding maskExpiredJan 06, 82Aug 09, 83[G06C]

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