Granted Patent
Utility
US 6,836,374 · App. 10/717,832
Lens system and methods for power adjustment
Inventors:
Victor C. Esch, John H. Shadduck
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Nov 19, 2003
Inventors
Victor C. Esch
John H. Shadduck
Assignee (at issue)
PowerVision, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.