Granted Patent
Utility
US 4,827,624 · App. 07/079,368
Electronic level
Inventors:
Robert C. Franklin, Charles J. Stauss
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Jul 30, 1987
Inventors
Robert C. Franklin
Charles J. Stauss
Assignee (at issue)
Zircon International, Inc.
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.