PHONETEL COMMUNICATIONS, INC.
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Jul 21, 1992 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 332 Total Citation Count
- Nov 08, 1978 Earliest Filing
- 7 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
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Recent Publications
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Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5133060 Disk controller includes cache memory and a local processor which limits data transfers from memory to cache in accordance with a maximum look ahead parameterExpiredJun 05, 89Jul 21, 92[G06F]
5129057 Method for presenting compressed electronic day calendar information in an interactive information handling systemExpiredApr 19, 91Jul 07, 92[G06F]
5093901 System for exchanging electronic calendars based on entries and classification among users of the systemExpiredSep 30, 88Mar 03, 92[G06F]
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