Howtek, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6606171 Digitizing scannerExpiredOct 09, 97Aug 12, 03[H04N]
6105954 Sheet feeder for digitizing scannerExpiredOct 15, 97Aug 22, 00[B65H]
6023348 Rotary image scanner capable of mounting drums of various diametersExpiredOct 18, 94Feb 08, 00[H04N]
5515182 Rotary scannerExpiredAug 31, 92May 07, 96[H04N, G03F]
5424537 Calibrated color scannerExpiredAug 13, 90Jun 13, 95[H01J]
5410420 Drum scanner focusing systemExpiredApr 14, 93Apr 25, 95[G01J, G03F]
5367769 Method of manufacturing a rotary scanning drumExpiredSep 25, 92Nov 29, 94[B23P]
5237172 Calibrated color scanner with reference level adjustmentExpiredAug 28, 92Aug 17, 93[H01J, H04N]
5196236 Ink jet color printing methodExpiredAug 22, 90Mar 23, 93[B05D]
5084712 Head tending method and apparatus for an ink jet printerExpiredMay 10, 90Jan 28, 92[B41J]
4974070 Colorgraphic reproduction systemExpiredApr 20, 89Nov 27, 90[H04N, G03F]
4968994 Head tending apparatus for an ink jet printerExpiredMay 30, 89Nov 06, 90[B41J, G01D]
4931095 Benzoate inksExpiredNov 15, 88Jun 05, 90[C09D]
4928112 Ink curing apparatusExpiredMar 23, 87May 22, 90[B41J, G01D]
4870430 Solid ink delivery systemExpiredNov 02, 87Sep 26, 89[B65G, G01D]
4870431 Ink jet priming systemExpiredNov 02, 87Sep 26, 89[G01D]
4820346 Ink jet printer inkExpiredMar 31, 87Apr 11, 89[C09D]
4741930 Ink jet color printing methodExpiredOct 20, 86May 03, 88[B41M, B05D]
4721635 Color printed record and methodExpiredDec 17, 86Jan 26, 88[B41M]
4714936 Ink jet printerExpiredJun 24, 85Dec 22, 87[G01D]

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