Inventor

PORCHE MICHAEL N

US3 patents

⚠️ This page may combine multiple inventors who share the name “PORCHE MICHAEL N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RIG EFFICIENCY INC

2 patents

US4590416AMay 20, 1986

Closed loop power factor control for power supply systems

RIG EFFICIENCY INC85 citations89

US4482857ANov 13, 1984

Closed loop power factor control for drilling rigs

RIG EFFICIENCY INC18 citations67

NAT OILWELL VARCO LP

1 patent

US7946356B2May 24, 2011

Systems and methods for monitored drilling

NAT OILWELL VARCO LP39 citations88