Granted Patent
Utility
US 6,808,263 · App. 10/280,073
Progressive spectacle lens producing only slight dynamic distortion
Inventors:
Andrea Welk, Peter Baumbach, Walter Haimerl, Herbert Pfeiffer, Gregor Esser, Helmut Altheimer, Rainer Dorsch
Patented Case
View Patent ↗
Granted: Oct 26, 2004
Filed: Oct 25, 2002
Inventors
Andrea Welk
Peter Baumbach
Walter Haimerl
Herbert Pfeiffer
Gregor Esser
Helmut Altheimer
Rainer Dorsch
Assignee (at issue)
RODENSTOCK GMBH
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.