Granted Patent
Utility
US 5,644,133 · App. 08/506,476
Remote vehicle emission analyzer with light conveyance to detectors through fiber optic light tubes
Inventors:
John DiDomenico, Dennis L. Smith, James H. Johnson
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jul 25, 1995
Inventors
John DiDomenico
Dennis L. Smith
James H. Johnson
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.