AV

Andrei N. Vshivkov

📍 Perm, RU: #11 of 143 inventorsTop 8%
Overall (All Time): #1,658,186 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5228526 Overflow valve of drill string Anatoly M. Kochnev, Gennady A. Schelkonogov, Vladimir B. Goldobin, Mikhail G. Bobrov 1993-07-20
5221197 Working member of a helical downhole motor for drilling wells Anatoly M. Kochnev, Vladimir B. Goldobin 1993-06-22
4909337 Rotor of a screw hydraulic downhole motor, method for its production and a device for its production Anatoly M. Kochnev, Vladimir B. Goldobin, Samuil S. Nikomarov 1990-03-20