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. 26, 2007
Filed:
Sep. 24, 2004
Applicant:
Richard Y. Chang, Brooklyn, NY (US);
Inventor:
Richard Y. Chang, Brooklyn, NY (US);
Assignee:
Altera Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 19/177 (2006.01); G06F 12/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Methods and system for achieving improved copyright protection for programmable logic devices are disclosed. One preferred embodiment comprises a programmable logic device comprising a programmable element programmed by a mutated programming pattern, said mutated programming pattern causing the PLD to generate a mutated output; and a circuit element that translates the mutated output into a normal output.