Granted Patent
Utility
US 6,597,288 · App. 10/000,025
Fire alarm system
Inventors:
Masayuki Amano, Takayuki Nishikawa, Takeshi Wada, Shoichi Oka, Junichi Watanabe
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Dec 4, 2001
Inventors
Masayuki Amano
Takayuki Nishikawa
Takeshi Wada
Shoichi Oka
Junichi Watanabe
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.