Inventor

DUVAL HENRY H

US3 patents

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

DUVAL HENRY H

2 patents

US4451180AMay 29, 1984

Method for restructuring railway roadbeds

DUVAL HENRY H27 citations86

US4511283AApr 16, 1985

Method and apparatus for sealing of pavement seams

DUVAL HENRY H27 citations85

ELLIS WILLIAM B

1 patent

US4464200AAug 7, 1984

Plastic soil stabilizer composition and method of use

ELLIS WILLIAM B17 citations65