Granted Patent
Utility
US 6,776,361 · App. 10/019,936
Powder material spraying device
Inventors:
Yasushi Watanabe, Kimiaki Hayakawa, Kiyoshi Morimoto
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Apr 24, 2002
Inventors
Yasushi Watanabe
Kimiaki Hayakawa
Kiyoshi Morimoto
Assignee (at issue)
KYOWA HAKKO KOGYO CO., LTD.
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.