William L. Shepherd

HC Hughes Tool Company: 2 patents #44 of 224Top 20%

📍 Conroe, TX: #208 of 788 inventorsTop 30%

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

Overall (All Time): #1,177,407 of 4,157,543Top 30%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
10260289	Drilling system with drill bit for mining machine	—	2019-04-16
6202766	Relief valve	—	2001-03-20
4451162	Spaced button thrust surface for earth boring bit	—	1984-05-29
4261251	Kelly head for hydraulic mast digger	—	1981-04-14