Birch; Richard J.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6001174 Method for growing a diamond crystal on a rheotaxy templateExpiredMar 11, 98Dec 14, 99[C30B]
5183508 Apparatus for patch coating printed circuit boardsExpiredFeb 23, 90Feb 02, 93[B05C]
4938994 Method and apparatus for patch coating printed circuit boardsExpiredNov 23, 87Jul 03, 90[B05D, G03C]
4884337 Method for temporarily sealing holes in printed circuit boards utilizing a thermodeformable materialExpiredOct 15, 87Dec 05, 89[H05K]
4777721 Apparatus and method for temporarily sealing holes in printed circuit boards utilizing a thermodeformable materialExpiredOct 15, 87Oct 18, 88[H05K, B32B]
4748742 Method for temporarily sealing holes in printed circuit boardsExpiredNov 26, 86Jun 07, 88[H05K]
4702965 Low vacuum silicon thin film solar cell and method of productionExpiredDec 17, 85Oct 27, 87[B05D]
4700474 Apparatus and method for temporarily sealing holes in printed circuit boardsExpiredNov 26, 86Oct 20, 87[H05K, B32B]
4639543 Semiconductor devices having a metallic glass substrateExpiredMar 08, 85Jan 27, 87[H01L]

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