The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 1999
Filed:
Jan. 17, 1997
David L Ingalsbe, Paynesville, MN (US);
Michael A Lynch, Wilmar, MN (US);
Independent Technologies, Inc., Omaha, NE (US);
Abstract
A telephone-line powered coin telephone chassis which operates on as little as 23 milliamperes of off-hook loop current and which shuts down on-hook. Capacitors power a microprocessor for a short time during on-hook coin control immediately after a phone call. The chassis is designed to operate with the WESROC.RTM. coin telephone monitoring system and has built-in circuitry which makes a direct communications link between a remote unit of the WESROC system and the chassis. Connectors are built into the chassis for electrically connecting the chassis to the WESROC remote unit and to coin telephone components external to the chassis. Built into the chassis is circuitry for preventing tone fraud and pin fraud, detecting the presence of the handset, a push-button line diagnostic test, an interface for a volume switch and an interface for an electronic coin chute.