Inventor · disambiguated record
Edward R. Langfield
Also filed as: HILE JAMES L · LANGFIELD EDWARD R
5 granted patents·53 citations·filing 1977–1980
79Inventor score
Top patents by PatentIndex Score
5 records- 0172US4215901AHydraulically actuated tool for mechanically splitting rock-like materialLANGFIELD EDWARD R·Filed 1978·Granted Aug 5, 1980·19 cites·8 claims
- 0257US4114951AHydraulically actuated tool for mechanically splitting rock-like materialLANGFIELD EDWARD R·Filed 1977·Granted Sep 19, 1978·10 cites·35 claims
- 0355US4320924AReciprocated concrete surfacer member with shielded spring returnELCO INT·Filed 1980·Granted Mar 23, 1982·18 cites·15 claims
- 0437US4168862AWear or thrust plates for hydraulic rock splitting apparatusLANGFIELD EDWARD R·Filed 1978·Granted Sep 25, 1979·4 cites·7 claims
- 0528US4252375AWear or thrust plates for hydraulic rock splitting apparatusLANGFIELD EDWARD R·Filed 1979·Granted Feb 24, 1981·2 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →