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:
May. 12, 1998
Filed:
Sep. 04, 1996
Applicant:
Inventors:
Jeffrey K Fergason, Menlo Park, CA (US);
John D Fergason, Mountainview, CA (US);
Assignee:
OSD Envizion, Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; G02F / ;
U.S. Cl.
CPC ...
345-7 ; 349 14 ; 349 16 ; 2-8 ;
Abstract
A power supply circuit for a liquid crystal welding lens or shutter provides a consistent and stable regulated power signal for driving or powering the liquid crystal shutter for maintaining stable performance over the life of the power supply and a battery level indicator feature to provide advance warning of degraded device performance.
Fergason, Jeffrey. (1998). Liquid crystal lens driver electronics for eye protection, high speed (U.S. Patent No. 5751258). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5751258
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile