Granted Patent
Utility
US 5,220,637 · App. 07/904,960
Method and apparatus for controllably generating smoke
Inventors:
Charles J. Levin, III, Thomas James DeSalvo
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jun 26, 1992
Inventors
Charles J. Levin, III
Thomas James DeSalvo
Assignee (at issue)
AAI Corporation
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.