Granted Patent
Utility
US 4,246,717 · App. 06/026,528
Bubble pipe
Inventor:
Jack S. Wachtel
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Apr 3, 1979
Inventor
Jack S. Wachtel
Assignee (at issue)
Joseph R. Ehrlich
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.