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:
Apr. 04, 1989
Filed:
Jul. 07, 1986
Applicant:
Inventor:
Hartmut Schrenk, Haar, DE;
Assignee:
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G11C / ; G06K / ;
U.S. Cl.
CPC ...
364900 ; 365218 ; 235380 ; 235487 ;
Abstract
A process for carrying out a release operation for a user memory includes releasing a user function in dependence on a preceding data comparison of externally entered data with reference data stored in a code memory, continuously changing the content of a control memory ahead of every release, and monitoring the change through a comparison of the initial control memory content with the changed control memory content and apparatus for carrying out the method.