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:
Aug. 07, 1990
Filed:
Oct. 12, 1988
Peter C DiGiulio, Bridgeport, CT (US);
David K Lee, Monroe, CT (US);
Pitney Bowes Inc., Stamford, CT (US);
Abstract
A communication network comprised of a first, second and third controller node. Each of the controller nodes includes a microprocessor for generating and receiving data messages. The first nodes has a transmit pin in line communication with the receive pin of the second nodes and has a receive pin in line communication with the transmit pin of the second node. The third controller receive pin is in line communication with the transmit pin of the first node and its transmit pin is in line communication with the receive pin of the first node. The microprocessors are programmed to respond to and generate suitable formatted data message bytes. The microprocessors are further programmable to respond only to a unique address-command data message byte from the message source node. The microprocessor will then issue a reply message byte to the destination node. The transmitting node will then send a data message. Where the receiving node is the third node, a data message from the third node must then follow. The protocol is software implemented and includes means of detecting a message error and resolving transmission line content.