Granted Patent
Utility
US 4,836,669 · App. 07/120,817
Apparatus and method for projection of reference planes of light
Inventor:
Ted L. Teach
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Nov 16, 1987
Inventor
Ted L. Teach
Assignee (at issue)
Spectra-Physics, 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.