P

Inventor

CLARK CARL A

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

EASTERN CO

6 patents
US5344257ASep 6, 1994

Mine roof expansion anchor and bail element

EASTERN CO34 citations92
US5282698AFeb 1, 1994

Threaded fastener, method of fabrication thereof and method of supporting a mine roof using such a fastener

EASTERN CO25 citations92
US5094577AMar 10, 1992

Mine roof expansion anchor

EASTERN CO27 citations92
US5011337AApr 30, 1991

Mine roof expansion anchor shell and leaf

EASTERN CO24 citations92
US4403894ASep 13, 1983

Rock bolt expansion anchor having windened expansion range

EASTERN CO30 citations92
US4913593AApr 3, 1990

Mine roof expansion anchor

EASTERN CO20 citations73

CLARK CARL A

2 patents
US4662795AMay 5, 1987

Method of supporting a mine roof using nut element with breakable portion

CLARK CARL A34 citations87
US4269205AMay 26, 1981

Thumb hair gauge

CLARK CARL A10 citations64

BIRMINGHAM BOLT CO

1 patent
US4764055AAug 16, 1988

Resin reinforced expansion anchor system

BIRMINGHAM BOLT CO72 citations95

EASTERN

1 patent
US4162133AJul 24, 1979

Resin reinforced expansion anchor and method of installation

EASTERN43 citations88