Granted Patent
Utility
US 6,779,889 · App. 10/258,818
Progressive spectacle lens exhibiting only slight dynamic change of the properties of use during a horizontal viewing movements
Inventors:
Andrea Welk, Peter Baumbach, Walter Haimerl, Herbert Pfeiffer, Gregor Esser, Helmut Altheimer, Rainer Dorsch, Martin L. Zimmerman
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Mar 28, 2003
Inventors
Andrea Welk
Peter Baumbach
Walter Haimerl
Herbert Pfeiffer
Gregor Esser
Helmut Altheimer
Rainer Dorsch
Martin L. Zimmerman
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.