Richard H. Roydhouse

📍 Vancouver, CA: #1,230 of 5,070 inventorsTop 25%

Overall (All Time): #1,297,640 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
5093024	Composition able to absorb mercury vapor and to disinfect a surface	—	1992-03-03
4876025	Composition to absorb mercury	—	1989-10-24
4534944	Mercury vapor suppressant	—	1985-08-13
4419107	Mercury filtering apparatus and method	—	1983-12-06