Inventor

HAPSTACK MARK

US2 patents

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

US ARMY

1 patent

US5285689AFeb 15, 1994

Piping inspection instrument carriage with precise and repeatable position control and location determination

US ARMY127 citations91

US ENERGY

1 patent

US5018451AMay 28, 1991

Extendable pipe crawler

US ENERGY91 citations91