Granted Patent
Utility
US 5,700,489 · App. 08/653,791
Bubble stabilizer and sizing cage with wear strips
Inventor:
Earl T. Pottorff
Patented Case
View Patent ↗
Granted: Dec 23, 1997
Filed: May 28, 1996
Inventor
Earl T. Pottorff
Assignee (at issue)
Pearl Technologies, Inc.
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.