Granted Patent
Utility
US 4,629,321 · App. 06/781,095
Grade setting and calibration arrangement for laser beam projection device
Inventors:
Edward E. Hart, Ted L. Teach
Patented Case
View Patent ↗
Granted: Dec 16, 1986
Filed: Sep 27, 1985
Inventors
Edward E. Hart
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.