Assignee
PVI IND INC
US·20 granted patents·380 citations·filing 1977–1997
Top patents by PatentIndex Score
20 records- 0179US4981112APotable hot water storage vessel and method of manufacturePVI IND INC·Filed 1989·Granted Jan 1, 1991·40 cites·10 claims
- 0279US4938204AWater heater or boiler with improved thermal efficiencyPVI IND INC·Filed 1989·Granted Jul 3, 1990·37 cites·14 claims
- 0375US4254826AModular heat exchangerPVI IND INC·Filed 1979·Granted Mar 10, 1981·28 cites·10 claims
- 0472US5775268AHigh efficiency vertical tube water heater apparatusPVI IND INC·Filed 1996·Granted Jul 7, 1998·26 cites·13 claims
- 0571US4545329AWater heaterPVI IND INC·Filed 1984·Granted Oct 8, 1985·23 cites·19 claims
- 0669US6044803AVertical tube water heater apparatusPVI IND INC·Filed 1997·Granted Apr 4, 2000·24 cites·8 claims
- 0769US4465024AWater heaterPVI IND INC·Filed 1983·Granted Aug 14, 1984·22 cites·12 claims
- 0865US4204573AHeat exchanger with concentric flow tubesPVI IND INC·Filed 1977·Granted May 27, 1980·20 cites·6 claims
- 0961US4869208ACompact modular fluid storage and heating systemPVI IND INC·Filed 1986·Granted Sep 26, 1989·17 cites·8 claims
- 1059US5666944AWater heating apparatus with passive flue gas recirculationPVI IND INC·Filed 1995·Granted Sep 16, 1997·20 cites·4 claims
- 1157US4968066ABolt-on flangePVI IND INC·Filed 1989·Granted Nov 6, 1990·21 cites·6 claims
- 1254US5666943AWater heater or boiler with improved tank designPVI IND INC·Filed 1995·Granted Sep 16, 1997·16 cites·16 claims
- 1354US5395230AHigh ratio modulation combustion system and method of operationPVI IND INC·Filed 1993·Granted Mar 7, 1995·17 cites·8 claims
- 1451US5713515AMethod and system in a fluid heating apparatus for efficiently controlling combustionPVI IND INC·Filed 1995·Granted Feb 3, 1998·16 cites·10 claims
- 1551US5437249ACombination burner and flue gas collector for water heaters and boilersPVI IND INC·Filed 1993·Granted Aug 1, 1995·15 cites·9 claims
- 1644US5220887AModular vertical tube tank and method of manufacturePVI IND INC·Filed 1992·Granted Jun 22, 1993·13 cites·8 claims
- 1741US5479913ADirect contact water heaterPVI IND INC·Filed 1995·Granted Jan 2, 1996·9 cites·16 claims
- 1841US5400962ASystem and method for reduced purge operation of a forced draft burner in a water heaterPVI IND INC·Filed 1993·Granted Mar 28, 1995·8 cites·8 claims
- 1937US4936260ABoiler or water heater with insulated water tankPVI IND INC·Filed 1989·Granted Jun 26, 1990·5 cites·5 claims
- 2033US5772422ABurner array for water heating apparatusPVI IND INC·Filed 1996·Granted Jun 30, 1998·3 cites·20 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →