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:
Jul. 04, 2000
Filed:
Jan. 23, 1997
Applicant:
Inventors:
Geary L Chew, Foster City, CA (US);
Matthew K Schwiebert, Cupertino, CA (US);
Ayn R Lavagnino, Palo Alto, CA (US);
Andy H Uchida, Mountain View, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
335283 ; 269-8 ;
Abstract
A mask support device including two communicating elements, a first element having ferromagnetic shunts, and a second element containing permanent magnets, and wherein the elements are rotatable about a central axis and assume fixed positions in the rotation. The mask support device in one position attracts a ferromagnetic metal mask. In a second position, owing to the shunt redirecting the magnetic field, releases the metal mask.