Inventor

HALL DOUGLAS D

US7 patents

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

VETCO GRAY INC ABB

2 patents

US6016880AJan 25, 2000

Rotating drilling head with spaced apart seals

VETCO GRAY INC ABB145 citations96

US6176328B1Jan 23, 2001

Drill pipe protection rings and method of using the same

VETCO GRAY INC ABB7 citations70

ARMCO INC

2 patents

US4443130AApr 17, 1984

Remotely operated tool for performing functions under water

ARMCO INC40 citations90

US4405263ASep 20, 1983

Underwater devices with remotely operated latch means

ARMCO INC35 citations90

NAT OILWELL

1 patent

US4746246AMay 24, 1988

Remotely actuated cutting assembly for broken underwater guidelines

NAT OILWELL26 citations91

DRIL QUIP INC

1 patent

US7066267B2Jun 27, 2006

Downhole tubular splitter assembly and method

DRIL QUIP INC8 citations71

JPS COMMUNICATIONS INC

1 patent

US7436951B2Oct 14, 2008

Portable interconnection system for incompatible audio communication networks

JPS COMMUNICATIONS INC0 citations36