Assignee
SPIRO RESEARCH BV
US·13 granted patents·231 citations·filing 1981–2000
Top patents by PatentIndex Score
13 records- 0180US6926069B1Method for manufacturing a double-walled heat exchanging tube with leak detectionSPIRO RESEARCH BV·Filed 2000·Granted Aug 9, 2005·24 cites·14 claims
- 0277US4718922AMethod of and apparatus for the deaeration of liquid flowing in a closed circulation systemSPIRO RESEARCH BV·Filed 1985·Granted Jan 12, 1988·32 cites·24 claims
- 0377US4456172AMethod of and apparatus for the degasification of circulation systems for liquidsSPIRO RESEARCH BV·Filed 1981·Granted Jun 26, 1984·29 cites·6 claims
- 0476US4381928AApparatus for venting and/or degassing a pipeline systemSPIRO RESEARCH BV·Filed 1981·Granted May 3, 1983·30 cites·39 claims
- 0566US4645518AMethod and apparatus for reducing the gas content of a liquidSPIRO RESEARCH BV·Filed 1985·Granted Feb 24, 1987·21 cites·34 claims
- 0664US4655282AHeat exchanger duct with heat exchange wiringSPIRO RESEARCH BV·Filed 1984·Granted Apr 7, 1987·20 cites·5 claims
- 0758US6192583B1Heat exchanger tube and method of manufacturing sameSPIRO RESEARCH BV·Filed 1997·Granted Feb 27, 2001·18 cites·16 claims
- 0857US4747737AFixing device for mounting objects on supportsSPIRO RESEARCH BV·Filed 1986·Granted May 31, 1988·22 cites·11 claims
- 0951US5601635AMethod and apparatus for deaerating a liquid in a substantially closed liquid circulation systemSPIRO RESEARCH BV·Filed 1994·Granted Feb 11, 1997·15 cites·10 claims
- 1047US6526921B1Method for operating a closed hot-water installation and apparatus to be used therewithSPIRO RESEARCH BV·Filed 1999·Granted Mar 4, 2003·11 cites·11 claims
- 1135US6119951AExpansion control for a closed fluid circulation systemSPIRO RESEARCH BV·Filed 1996·Granted Sep 19, 2000·5 cites·13 claims
- 1231US5456409AMethod and device for maintaining a fluid at a working pressure in a substantially closed fluid circulation systemSPIRO RESEARCH BV·Filed 1993·Granted Oct 10, 1995·3 cites·22 claims
- 1329US4646823APipe for utility or service systemsSPIRO RESEARCH BV·Filed 1985·Granted Mar 3, 1987·1 cites·2 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →