YASHIMA ELECTRIC CO., LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6101667 Vacuum cleanerExpiredSep 02, 98Aug 15, 00[A47L]
6055702 Vacuum cleanerExpiredSep 09, 98May 02, 00[A47L]
6029309 Vacuum cleaner with dust bag fill detectorExpiredApr 08, 97Feb 29, 00[A47L]
6023814 Vacuum cleanerExpiredSep 15, 97Feb 15, 00[A47L]
5819367 Vacuum cleaner with optical sensorExpiredFeb 25, 97Oct 13, 98[A47L]
5815884 Dust indication system for vacuum cleanerExpiredNov 27, 96Oct 06, 98[A47L]
5774602 Writing device for storing handwritingExpiredJul 13, 95Jun 30, 98[G06K]
5748808 Image reproducing method and apparatus capable of storing and reproducing handwritingExpiredDec 06, 94May 05, 98[G06K]
5660749 Transformer and A.C. arc welderExpiredFeb 10, 95Aug 26, 97[B23K]
5581622 Head setExpiredJan 18, 95Dec 03, 96[H04R]
5572767 Generator system for a vacuum cleanerExpiredJul 25, 94Nov 12, 96[A47L]
5404612 Vacuum cleanerExpiredAug 18, 93Apr 11, 95[A47L]
5215397 Writing device for storing handwritingExpiredMar 30, 92Jun 01, 93[G06K]

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