Granted Patent
Utility
US 5,812,249 · App. 08/717,226
Speed and acceleration monitoring device using visible laser beams
Inventors:
James H. Johnson, John Di Domenico
Patented Case
View Patent ↗
Granted: Sep 22, 1998
Filed: Sep 26, 1996
Inventors
James H. Johnson
John Di Domenico
Assignee (at issue)
Envirotest Systems Holdings Corp.
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.