Inventor

HELDENBRAND WILLIAM C

US3 patents

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

HELDENBRAND WILLIAM C

2 patents

US4789137ADec 6, 1988

Knock-down cattle guard

HELDENBRAND WILLIAM C11 citations66

US4516431AMay 14, 1985

Pipe testing apparatus

HELDENBRAND WILLIAM C15 citations66

HENRY ROBERT R

1 patent

US4480482ANov 6, 1984

Elastic limit detection and reset testing system

HENRY ROBERT R9 citations66