Douglas P. Hand

📍 Lake Oswego, OR: #226 of 769 inventorsTop 30%

🗺 Oregon: #7,313 of 28,073 inventorsTop 30%

Overall (All Time): #1,010,357 of 4,157,543Top 25%

Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #	Title	Co-Inventors	Date
8819874	Flush valve structure for a toilet tank	—	2014-09-02
7865979	Flush valve structure for a toilet tank	—	2011-01-11
6658673	Toilet valve assembly	—	2003-12-09
6637042	Toilet valve assembly	—	2003-10-28
6484327	Toilet valve assembly	—	2002-11-26