Inventor · disambiguated record
Robert R. Hellman, Sr.
Also filed as: HELLMAN ROBERT · HELLMAN ROBERT R · HELLMAN SR ROBERT R
9 granted patents·1 pending application·127 citations·filing 1975–2023
88Inventor score
Top patents by PatentIndex Score
10 records- 0185US8127492B1Compound barrier mechanism for passageway controlHELLMAN SR ROBERT R·Filed 2009·Granted Mar 6, 2012·16 cites·14 claims
- 0283US4006329ASwitch for sensing a selected ratio between two different pressuresWESTPORT DEV MFG CO·Filed 1975·Granted Feb 1, 1977·34 cites·2 claims
- 0362US5118121ACompound gasket useful for high temperature, high pressure serviceHELLMAN SR ROBERT R·Filed 1991·Granted Jun 2, 1992·26 cites·16 claims
- 0454US4995549AMethod and apparatus for forming and welding thin-wall tubingHELLMAN SR ROBERT R·Filed 1990·Granted Feb 26, 1991·18 cites·17 claims
- 0554US4017699ADual acting snap switchWESTPORT DEV MFG CO·Filed 1975·Granted Apr 12, 1977·8 cites·4 claims
- 0652US2025376384A1Carbon dioxide negative direct lithium extraction (dle) process: bipolar electrodialysis (bped) to lithium hydroxide monohydrate and lithium carbonateENERGY EXPLORATION TECH INC·Filed 2023·Application pending·0 cites
- 0745US5320331AMethod and apparatus for forming corrugations in tubing and a corrugated tube produced therebyHELLMAN SR ROBERT R·Filed 1992·Granted Jun 14, 1994·12 cites·24 claims
- 0837US5302789ASnap switch having low resistanceWESTPORT DEV MFG CO·Filed 1993·Granted Apr 12, 1994·8 cites·6 claims
- 0929US5445361AFluid flow valveHELLMAN SR ROBERT R·Filed 1994·Granted Aug 29, 1995·3 cites·12 claims
- 1021US5425261AMethod for forming thin-wall tubingHELLMAN SR ROBERT R·Filed 1993·Granted Jun 20, 1995·2 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →