Granted Patent
Utility
US 4,824,228 · App. 06/935,866
Stereomicroscopic inspection system with low eyestrain features
Inventors:
David R. Wickholm, Donald J. Strittmatter
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Nov 28, 1986
Inventors
David R. Wickholm
Donald J. Strittmatter
Assignee (at issue)
Hughes Aircraft Company
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.