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:
Aug. 04, 2009
Filed:
Jan. 25, 2007
Applicant:
Randall Orson Willard, Corvallis, OR (US);
Inventor:
Randall Orson Willard, Corvallis, OR (US);
Assignee:
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/60 (2006.01);
U.S. Cl.
CPC ...
Abstract
A projection screen () includes a plurality of asperities () extending from a substrate, the asperities having faces oriented in a plurality of directions. A photosensitive material is disposed preferentially on the faces so that a differing amount of photosensitive material is present on faces oriented generally toward a projector direction () relative to faces oriented generally away from the projector direction ().