Granted Patent
Utility
US 5,547,102 · App. 08/505,598
Plastic tank manway bulge restrictor
Inventors:
David D. Rule, Toby D. Rule
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: Jul 21, 1995
Inventors
David D. Rule
Toby D. Rule
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.