Preh, Elektrofeinmechanische Werke, Jakob Preh, Nachf. GmbH & Co.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4997998 Key cap for a keyboardExpiredOct 26, 88Mar 05, 91[H01H]
4992784 Remote control setExpiredNov 08, 88Feb 12, 91[H04Q]
4985002 Shielded circular plug connectorExpiredOct 25, 88Jan 15, 91[H01R]
4902862 Keyboard switch device for facilitating removal and replacement of push buttonsExpiredMay 12, 88Feb 20, 90[H01H]
4903002 Displacement or position transducerExpiredMar 25, 88Feb 20, 90[H01C]
4887520 Air outlet deviceExpiredMar 07, 88Dec 19, 89[F24F]
4887971 Re-shielded coupling partExpiredNov 10, 88Dec 19, 89[H01R]
4841626 Process for forming nonlinear resistance tracksExpiredSep 11, 87Jun 27, 89[H01C]
4840114 Air outlet deviceExpiredApr 13, 88Jun 20, 89[B60H]
4821413 Method of making electric componentExpiredApr 07, 87Apr 18, 89[H01R]
4823238 Air outlet deviceExpiredMay 06, 88Apr 18, 89[F21V, B60Q]
4816801 Variable resistorExpiredSep 11, 87Mar 28, 89[H01C]
4803323 Electric manual switching device having environmentally protected componentsExpiredJan 30, 87Feb 07, 89[H01H]
4800466 Illumination device for a front panelExpiredMay 03, 88Jan 24, 89[G01D]
4790199 Mechanical control deviceExpiredJan 15, 88Dec 13, 88[F16H]
4773780 Keyboard with a metal carrier plateExpiredOct 24, 86Sep 27, 88[B41J]
4771262 Rotary potentiometer drive meansExpiredApr 10, 87Sep 13, 88[H01C]
4768230 Housing for a hand-held remote control transmitterExpiredApr 09, 86Aug 30, 88[H04B]
4763101 Locking slide switchExpiredApr 02, 85Aug 09, 88[H01C]
4758185 Multiple connectorExpiredDec 11, 85Jul 19, 88[H01R]

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