Inventor · disambiguated record
Hans-Ferdinand Bemmerl
Also filed as: BEMMERL HANS-FERDINAND
9 granted patents·43 citations·filing 1976–1992
84Inventor score
Technology areasE21D
Top patents by PatentIndex Score
9 records- 0161US4309130AMine roof supportBOCHUMER EISEN HEINTZMANN·Filed 1980·Granted Jan 5, 1982·12 cites·10 claims
- 0260US4140430AWalking mine roof supportBOCHUMER EISEN HEINTZMANN·Filed 1978·Granted Feb 20, 1979·10 cites·10 claims
- 0350US4028898APit prop assemblyBOCHUMER EISEN HEINTZMANN·Filed 1976·Granted Jun 14, 1977·7 cites·15 claims
- 0439US3992888AHydraulic pit propBOCHUMER EISEN HEINTZMANN·Filed 1976·Granted Nov 23, 1976·4 cites·10 claims
- 0528US4094155AMine roof supportBOCHUMER EISEN HEINTZMANN·Filed 1977·Granted Jun 13, 1978·1 cites·18 claims
- 0627US4065931AGuiding arrangement for underground excavating systemsBOCHUMER EISEN HEINTZMANN·Filed 1977·Granted Jan 3, 1978·1 cites·22 claims
- 0725US5190414AWalking prop for mine tunnelsSTREBTECHNIK BOCHUM GMBH & CO·Filed 1992·Granted Mar 2, 1993·8 cites·10 claims
- 0824US4755083AAdjustable cap unitBOCHUMER EISEN HEINTZMANN·Filed 1986·Granted Jul 5, 1988·0 cites·11 claims
- 0923US4487531ATravelling bracketBOCHUMER EISEN HEINTZMANN·Filed 1982·Granted Dec 11, 1984·0 cites·6 claims
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