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:
Dec. 05, 1989
Filed:
Nov. 02, 1987
Applicant:
Inventors:
Martin M Atalla, Atherton, CA (US);
Alan Roberts, Palo Alto, CA (US);
Assignee:
Atalla Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L / ;
U.S. Cl.
CPC ...
380 56 ; 380 57 ;
Abstract
An inexpensive encryption device, system and method includes coded alphanumeric characters preprinted according to different key codes on mail-out forms that can be manipulated by a prospective user to yield encrypted data that can be returned over unsecure transmission channels for secure decryption by the operator of a computer-secured operating system. Error-correcting encoding is included to obviate the effects upon telephone keypad entry of secured data that includes error-prone alpha and numeric characters.