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:
Nov. 24, 1998
Filed:
Mar. 24, 1995
Applicant:
Inventor:
Alfons Spies, Seebruck, DE;
Assignee:
Johannes Heidenhain GmbH, Traunreut, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B / ; G01B / ; G01D / ;
U.S. Cl.
CPC ...
32426721 ; 32420724 ; 324235 ; 32420712 ;
Abstract
A position measuring device having a magnetic graduation scanned by a scanner unit which contains magnetic field sensitive elements as sensors. A high frequency alternating auxiliary field is generated to magnetically bias the magnetic field sensitive elements.