Granted Patent
Utility
US 6,797,959 · App. 10/223,240
Sensitivity adjusting equipment of photoelectric smoke detector
Inventors:
Shenq-Tsong Chang, Ho-Lin Tsay, Tai-Shan Liao, Bih-Chang Wang, Ting-Ming Huang
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Aug 19, 2002
Inventors
Shenq-Tsong Chang
Ho-Lin Tsay
Tai-Shan Liao
Bih-Chang Wang
Ting-Ming Huang
Assignee (at issue)
Precision Instrument Development Center of National Science Council
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.