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:
Jun. 04, 1985
Filed:
Aug. 22, 1983
Samuel Bernard, Jr, Vadnais Heights, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A method of establishing communication between a first device (e.g. 12) in a first one (e.g. 22) of a plurality of groups (22, 32, 42 and 48) with a second device (e.g. 28) which is a selected one of a plurality of devices (e.g. 24, 26, and 28) and a second one (e.g. 32) of the plurality of groups (22, 32, 42 and 48). The method is utilizable in a communications system having a plurality of groups (22, 32, 42 and 48) and a plurality of devices (e.g. 24, 26 and 28) within at least one (e.g. 32) of the plurality of groups (22, 32, 42 and 48), where communication between the plurality of groups (22, 32, 42 and 48) is by a randomly addressable switching system (20), where each of the plurality of groups (22, 32, 42 and 48) has a unique address within the randomly addressable switching system (20), where each of the plurality of devices (e.g. 24, 26 and 28) within each of the plurality of groups (22, 32, 42 and 48) has a unique identification code within the dedicated line (18, 30, 40 and 46). The method consists of connecting (202) the first device to the switching system, addressing (204) the second group, responding (206) by all devices within the second group, addressing (210) the second device within the second group, disconnecting (212) all but the address device within the second group, and responding (216) by the second device to establish communication. Communication (218) between the first device and the second device may then commence.