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. 03, 1995
Filed:
Sep. 24, 1993
Verne L Severson, Chaska, MN (US);
John D Hardy, Jr, Chaska, MN (US);
DataCard Corporation, Eden Prairie, MN (US);
Abstract
A network interface circuit is interconnected to a network terminal to enable the network terminal to communicate with other network terminals on a local terminal network. The network interface circuit includes an RS-485 transceiver including a driver and transmitter function. A status timer 42 controls a status line back to the network so as to indicate to the network terminal when the network is in use. A driver timer is present to automatically enable the driver function of the RS-485 circuit when a start bit is received from the network terminal, the driver timer being designed to insure that RS-485 transmitter function remains active until all the data has been transmitted.