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:
Oct. 05, 1982
Filed:
Jul. 03, 1980
Applicant:
Inventor:
Eduard Bergmann, Luedenscheid, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Primary Examiner:
Int. Cl.
CPC ...
H04L / ; H04L / ;
U.S. Cl.
CPC ...
370 24 ; 178 2217 ;
Abstract
A method for the coded data transmission in half-duplex operation between data terminal devices of two data stations employs a code device of the one data station to transmit a phase-in program to the code device of the other data station. Thereby, the code devices of the two data stations communicate via corresponding data transmission devices in full-duplex operation. After phase-in of crypto units of the two data stations in one direction, change of direction programs, data and end identifications are transmitted, and in the opposite direction, simultaneously, synchronizing signals are transmitted.