Granted Patent
Utility
US 5,144,487 · App. 07/753,724
Portable laser device for alignment tasks
Inventor:
William Hersey
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Sep 3, 1991
Inventor
William Hersey
Assignee (at issue)
Pacific Laser
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.