Granted Patent
Utility
US 4,707,597 · App. 06/743,370
Method and apparatus for acoustic supervision of adjustment operations at optical devices
Inventors:
Joerg Schulz-Hennig, Horst Sievers
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jun 11, 1985
Inventors
Joerg Schulz-Hennig
Horst Sievers
Assignee (at issue)
Ing. Rudolf Hell 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.