Inventor · disambiguated record
Josef Welzel
Also filed as: WELZEL JOSEF
7 granted patents·22 citations·filing 1976–1989
80Inventor score
Files withHEMSCHEIDT MASCHF HERMANN7
Top patents by PatentIndex Score
7 records- 0139US4505299A3-Port, 2-position directional control valveHEMSCHEIDT MASCHF HERMANN·Filed 1983·Granted Mar 19, 1985·4 cites·4 claims
- 0236US4330226ARoof-support distancing apparatusHEMSCHEIDT MASCHF HERMANN·Filed 1980·Granted May 18, 1982·4 cites·8 claims
- 0331US3987634ARoof-supporting arrangementHEMSCHEIDT MASCHF HERMANN·Filed 1976·Granted Oct 26, 1976·2 cites·6 claims
- 0430US4964675AMethod of electro-hydraulic control of longwall mine unitsHEMSCHEIDT MASCHF HERMANN·Filed 1989·Granted Oct 23, 1990·5 cites·4 claims
- 0528US4380410AMine-roof supportHEMSCHEIDT MASCHF HERMANN·Filed 1981·Granted Apr 19, 1983·3 cites·7 claims
- 0627US5011433AMultipole connector for control devices in underground workingHEMSCHEIDT MASCHF HERMANN·Filed 1989·Granted Apr 30, 1991·4 cites·12 claims
- 0726US4073150ASuspended valve control deviceHEMSCHEIDT MASCHF HERMANN·Filed 1977·Granted Feb 14, 1978·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →