Assignee
HELLMAN SR ROBERT R
US·6 granted patents·77 citations·filing 1990–2009
Top patents by PatentIndex Score
6 records- 0185US8127492B1Compound barrier mechanism for passageway controlHELLMAN SR ROBERT R·Filed 2009·Granted Mar 6, 2012·16 cites·14 claims
- 0262US5118121ACompound gasket useful for high temperature, high pressure serviceHELLMAN SR ROBERT R·Filed 1991·Granted Jun 2, 1992·26 cites·16 claims
- 0354US4995549AMethod and apparatus for forming and welding thin-wall tubingHELLMAN SR ROBERT R·Filed 1990·Granted Feb 26, 1991·18 cites·17 claims
- 0445US5320331AMethod 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
- 0529US5445361AFluid flow valveHELLMAN SR ROBERT R·Filed 1994·Granted Aug 29, 1995·3 cites·12 claims
- 0621US5425261AMethod for forming thin-wall tubingHELLMAN SR ROBERT R·Filed 1993·Granted Jun 20, 1995·2 cites·7 claims
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