Robert D. Lancaster

📍 Bellaire, TX: #120 of 352 inventorsTop 35%

🗺 Texas: #33,546 of 125,132 inventorsTop 30%

Overall (All Time): #1,284,688 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
5706856	Valve apparatus	—	1998-01-13
4735229	Wear monitoring construction for erosive/corrosive flow conducting devices	—	1988-04-05
4470430	Drilling choke	—	1984-09-11
4215458	Extractor tool	—	1980-08-05