Digital Products Corporation
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Apr 07, 1992 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 534 Total Citation Count
- Jul 03, 1978 Earliest Filing
- 13 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5075670 Personnel monitoring tag with tamper detection and secure resetExpiredAug 01, 90Dec 24, 91[G08B]
4678994 Methods and apparatus employing apparent resonant properties of thin conducting materialsExpiredJun 27, 84Jul 07, 87[G01N, G01R]
4438296 Multimessage automatic telephone polling methods and apparatusExpiredSep 02, 80Mar 20, 84[H04M]
4356348 Techniques for detecting a condition of response on a telephone lineExpiredDec 07, 79Oct 26, 82[H04M]
4201896 Telephone polling apparatus using a plurality of timers to detect the line conditionsExpiredJul 03, 78May 06, 80[H04M]
4188510 Telephone sequential number dialer with number incrementingExpiredJul 03, 78Feb 12, 80[H04M]
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