Granted Patent
Utility
US 5,819,365 · App. 08/683,608
Window washing accessory cleaning tool for use with water extraction cleaning machine
Inventors:
Eric C. Huffman, Kevin Ma Kam Hoi, Ng Tat Shing, Hok Yin Timmy Sin
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Jul 15, 1996
Inventors
Eric C. Huffman
Kevin Ma Kam Hoi
Ng Tat Shing
Hok Yin Timmy Sin
Assignee (at issue)
BISSELL 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.