Inventor · disambiguated record
Harry J. Ledgerwood
Also filed as: LEDGERWOOD HARRY J · LEDGERWOOD HARRY JAMES
6 granted patents·144 citations·filing 1977–1995
85Inventor score
Top patents by PatentIndex Score
6 records- 0178US5649713AGasket for hub and spigot pipe jointsTYLER PIPE COMPANY A DIV OF RA·Filed 1995·Granted Jul 22, 1997·56 cites·1 claims
- 0270US4538839APipe joint couplingPLESSEY INC·Filed 1984·Granted Sep 3, 1985·34 cites·4 claims
- 0370US4513899AStock feeder with adjustable width feed pathPLESSEY INC·Filed 1982·Granted Apr 30, 1985·19 cites·5 claims
- 0469US4580710AStock feeder with hydraulic shock absorberPLESSEY INC·Filed 1984·Granted Apr 8, 1986·18 cites·6 claims
- 0561US4059212AStock feeder for punched stockPLESSEY INC·Filed 1977·Granted Nov 22, 1977·13 cites·8 claims
- 0635US4493447AHigh speed article feeding apparatusPLESSEY INC·Filed 1983·Granted Jan 15, 1985·4 cites·10 claims
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