Kirsch Technologies, Inc.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4839745 Computer memory back-upExpiredNov 13, 86Jun 13, 89[H04N]
4816911 Handling process and information stationExpiredFeb 17, 87Mar 28, 89[H04N]
4789961 Computer memory back-up with automatic tape positioningExpiredApr 22, 86Dec 06, 88[H04N, G06F]
4713267 Decorative ribbon and sheet materialExpiredApr 22, 86Dec 15, 87[D04D]
4652944 Computer memory back-upExpiredJun 25, 84Mar 24, 87[H04N]

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