Granted Patent
Utility
US 4,932,551 · App. 07/331,249
Composite tank assembly
Inventors:
Larry D. Thomas, David L. Waltke
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Mar 31, 1989
Inventors
Larry D. Thomas
David L. Waltke
Assignee (at issue)
Hoover Limited
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.