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:
Mar. 20, 1979
Filed:
Oct. 06, 1964
Applicant:
Inventor:
Kurt Ehrat, Zurich, CH;
Assignee:
Gretag Aktiengesellschaft, Regensdorf, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
178 22 ; 179 / ;
Abstract
Method and apparatus for ciphering and deciphering messages, wherein series of cipher pulses with an identical pulse distribution are generated by the transmitter and the receiver stations and said pulse distribution is determined by a secret basic code and a code which is derived from date and time.