Granted Patent
Utility
US 4,830,489 · App. 06/898,080
Three dimensional laser beam survey system
Inventors:
Gary Cain, DuWain K. Ake, Ted L. Teach
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Aug 20, 1986
Inventors
Gary Cain
DuWain K. Ake
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.