Inventor · disambiguated record
L. Robert Zifferer
Also filed as: ZIFFERER L ROBERT
9 granted patents·1 pending application·252 citations·filing 1993–2011
91Inventor score
Top patents by PatentIndex Score
10 records- 0192US7926160B2Method of forming a lined tubular memberPACKLESS IND·Filed 2005·Granted Apr 19, 2011·27 cites·16 claims
- 0292US6488079B2Corrugated heat exchanger element having grooved inner and outer surfacesPACKLESS METAL HOSE INC·Filed 2001·Granted Dec 3, 2002·48 cites·49 claims
- 0386US5409057AHeat exchange elementPACKLESS METAL HOSE INC·Filed 1993·Granted Apr 25, 1995·51 cites·40 claims
- 0485US5551504AHeat exchange elementPACKLESS METAL HOSE INC·Filed 1995·Granted Sep 3, 1996·43 cites·37 claims
- 0583US6923035B2Method and apparatus for forming a modified conduitPACKLESS METAL HOSE INC·Filed 2002·Granted Aug 2, 2005·23 cites·52 claims
- 0682US8434207B2Corrugated conduit and method of expanding to form a lined tubular memberZIFFERER L ROBERT·Filed 2011·Granted May 7, 2013·3 cites·24 claims
- 0781US7694402B2Method for forming a lined conduitPACKLESS METAL HOSE INC·Filed 2005·Granted Apr 13, 2010·10 cites·28 claims
- 0879US6968719B2Apparatus and methods for forming internally and externally textured tubingPACKLESS METAL HOSE INC·Filed 2004·Granted Nov 29, 2005·36 cites·19 claims
- 0968US6760972B2Apparatus and methods for forming internally and externally textured tubingPACKLESS METAL HOSE INC·Filed 2001·Granted Jul 13, 2004·11 cites·55 claims
- 1048US2010229996A1Method and apparatus for forming a lined conduitPACKLESS METAL HOSE INC·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →