Granted Patent
Utility
US 4,293,218 · App. 05/974,019
Reference light beam projector
Inventors:
Edward G. Nielsen, Kenneth C. Mosley, Louis M. Chatterson
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Dec 28, 1978
Inventors
Edward G. Nielsen
Kenneth C. Mosley
Louis M. Chatterson
Assignee (at issue)
Laser Alignment, 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.