Granted Patent
Utility
US 5,260,112 · App. 07/743,017
Compound glass element
Inventors:
Paul Grether, Tina Grether, heir, Moritz Grether-Escher, heir, Michael Grether
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Aug 9, 1991
Inventors
Paul Grether
Tina Grether, heir
Moritz Grether-Escher, heir
Michael Grether
Assignee (at issue)
Geilinger AG
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.