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. 05, 2007
Filed:
Oct. 26, 2004
Applicant:
Kenneth R. Wilsher, Palo Alto, CA (US);
Inventor:
Kenneth R. Wilsher, Palo Alto, CA (US);
Assignee:
Credence Systems Corporation, Milpitas, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11B 20/20 (2006.01); G04F 10/00 (2006.01); G01R 35/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
PICA probe system apparatus is described, including apparatus for calibrating an event timer having a coarse measurement capability in which time intervals defined by clock boundaries are counted and a fine measurement capability in which time between boundaries is interpolated using a voltage ramp.