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:
Jan. 26, 1982
Filed:
Jan. 23, 1980
Patrick Berstein, Thornhill, CA;
Imperial Oil Limited, Toronto, CA;
Abstract
A communications link between land vehicles and a stationary vehicle service installation is formed by a modulated optical link between transmitters mounted on the vehicles and receivers at the installation, the radiation and reception patterns of said transmitters and receivers being restricted so that communication is only possible between a particular receiver and the transmitter on a vehicle when that vehicle is within a restricted range of locations. To prevent interference between different receiver/transmitter pairs, the receivers are mounted at a different level from the transmitters, and the transmitters and receivers have asymmetric fields of radiation and reception.