QUORTECH GLOBAL SOLUTIONS, INC.
Patent Owner
Stats
- 13 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Dec 18, 2001 most recent publication
Details
- 13 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 112 Total Citation Count
- Sep 15, 1989 Earliest Filing
- 9 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
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Technologies
Intl Class
Technology
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
5315648 Retainer member for anchoring a telephone handset to a telephone housingDec 09, 92May 24, 94[H04M]
5216707 Circuit for firing paystation coin relay using power derived from telephone line tip/ring voltageAug 06, 91Jun 01, 93[H04M]
5187739 Answer supervision circuit for paystation telephone with non-muted microphoneAug 06, 91Feb 16, 93[H04M]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
6304643 Pay phone deposit method for limiting overpayment by a customerExpiredAug 03, 99Oct 16, 01[H04M]
6072863 Apparatus for conditioning automatic coin validation signals, and method-of-use thereforExpiredApr 01, 98Jun 06, 00[H04M]
5818916 Method and apparatus for preventing return dial tone fraud in a cellular paystationExpiredJun 20, 95Oct 06, 98[H04M]
5007079 Coin fraud prevention unit and modular configurations for pay telephone stationsExpiredOct 20, 89Apr 09, 91[H04M, G07F]
4918724 Coin fraud preventing unit and modular configurations for pay telephone stationsExpiredSep 15, 89Apr 17, 90[H04M, G07F]
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