Inventor

CALKINS CHARLES D

US4 patents

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

TDW DELAWARE INC

2 patents

US7353839B2Apr 8, 2008

High temperature completion plug

TDW DELAWARE INC15 citations82

US7270139B2Sep 18, 2007

Cam-assisted, wedge actuated, metal-to-metal seal, block and bleed plugging tool

TDW DELAWARE INC17 citations77

(unassigned)

1 patent

US6648562B1Nov 18, 2003

Apparatus for tapping a hole in a pipeline

62 citations88

CALKINS CHARLES D

1 patent

US7281543B2Oct 16, 2007

Apparatus, systems and methods for plugging a high temperature pipe

CALKINS CHARLES D30 citations85