IP Library › Granted Patent US 4,920,562
Granted Patent Utility
US 4,920,562 · App. 07/300,828

Automatic generation of billing records at a telephone paystation

Inventors: John A. Hird, Lindsey D. Owen, Michael R. Rice
Patented Case View Patent ↗
Granted: Apr 24, 1990 Filed: Jan 23, 1989
Inventors
John A. Hird
Lindsey D. Owen
Michael R. Rice
Assignee (at issue)
Intellicall, Inc.

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Quick Facts
Patent No.
US 4,920,562
App. No.
07/300,828
Filed
1989-01-23
Granted
1990-04-24
Kind
A