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Inventor

LEDGERWOOD HARRY J

US5 patents
⚠️ This page may combine multiple inventors who share the name “LEDGERWOOD HARRY J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

PLESSEY INC

4 patents
US4538839ASep 3, 1985

Pipe joint coupling

PLESSEY INC34 citations89
US4580710AApr 8, 1986

Stock feeder with hydraulic shock absorber

PLESSEY INC18 citations71
US4513899AApr 30, 1985

Stock feeder with adjustable width feed path

PLESSEY INC19 citations71
US4493447AJan 15, 1985

High speed article feeding apparatus

PLESSEY INC4 citations60

TYLER PIPE COMPANY A DIV OF RA

1 patent
US5649713AJul 22, 1997

Gasket for hub and spigot pipe joints

TYLER PIPE COMPANY A DIV OF RA56 citations88