Don R. Holbert

📍 Littleton, CO: #517 of 1,939 inventorsTop 30%

🗺 Colorado: #13,156 of 40,980 inventorsTop 35%

Overall (All Time): #1,681,714 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4456080	Stabilizer method and apparatus for earth-boring operations	—	1984-06-26
4449595	Method and apparatus for drilling a curved bore	—	1984-05-22
4420049	Directional drilling method and apparatus	—	1983-12-13