Inventor

BARR LAWRENCE ROBERT

GB2 patents

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

SMITH INTERNATIONAL

1 patent

US6173795B1Jan 16, 2001

Multi-cycle circulating sub

SMITH INTERNATIONAL194 citations96

(unassigned)

1 patent

US6095249AAug 1, 2000

Down hole bypass valve

74 citations93