Inventor · disambiguated record
Roger Siferd
Also filed as: SIFERD ROGER · SIFERD ROGER L · SIFERD ROGER LEE
3 granted patents·5 pending applications·88 citations·filing 1999–2011
75Inventor score
Top patents by PatentIndex Score
8 records- 0188US6199592B1Pipe structure and method of manufactureHANCOR INC·Filed 1999·Granted Mar 13, 2001·65 cites·38 claims
- 0271US6660199B2Pipe structure and method of manufactureHANCOR INC·Filed 2001·Granted Dec 9, 2003·14 cites·5 claims
- 0363US6565350B2Apparatus for forming a reinforcing structure on an end of a pipeHANCOR INC·Filed 2001·Granted May 20, 2003·9 cites·19 claims
- 0441US2006012166A1Articulating pipe jointHANCOR INC·Filed 2005·Application pending·0 cites
- 0539US2004041302A1Pipe structure and method of manufactureFiled 2003·Application pending·0 cites
- 0633US2005025573A1Liquid control structureFiled 2003·Application pending·0 cites
- 0729US2011277908A1Apparatus and method for sealing a ventilation channel of a pipeDOWNING DAVE·Filed 2011·Application pending·0 cites
- 0824US2011277866A1Apparatus and Method For Sealing A Ventilation Channel of A PipeDOWNING DAVE·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →