Granted Patent
Utility
US 6,178,985 · App. 09/333,069
Automatic drain system
Inventor:
Larry Robinson
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Jun 14, 1999
Inventor
Larry Robinson
Assignees (at issue)
Larry P. Robinson
Charlene B. Robinson
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.