Granted Patent
Utility
US 6,552,664 · App. 09/926,197
Method of fabricating a fire detector
Inventors:
Takayuki Nishikawa, Shinji Kirihata, Takeshi Wada, Yasuyuki Kawano, Shoichi Oka, Koji Sakamoto
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Sep 24, 2001
Inventors
Takayuki Nishikawa
Shinji Kirihata
Takeshi Wada
Yasuyuki Kawano
Shoichi Oka
Koji Sakamoto
Assignee (at issue)
Matsushita Electric Works, 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.