Assignee
BERU WERK RUPRECHT GMBH CO A
DE·23 granted patents·491 citations·filing 1981–1997
Top patents by PatentIndex Score
23 records- 0187US4459948AGlow plug for internal combustion enginesBERU WERK RUPRECHT GMBH CO A·Filed 1981·Granted Jul 17, 1984·28 cites·20 claims
- 0281US5589091AGlow plug with prestressed contact surfacesBERU WERK RUPRECHT GMBH CO A·Filed 1994·Granted Dec 31, 1996·40 cites·19 claims
- 0380US4963784ASpark plug having combined surface and air gapsBERU WERK RUPRECHT GMBH CO A·Filed 1989·Granted Oct 16, 1990·38 cites·20 claims
- 0480US4733053AGlow elementBERU WERK RUPRECHT GMBH CO A·Filed 1986·Granted Mar 22, 1988·19 cites·6 claims
- 0579US4795937ASpark plug with combined surface and air spark pathsBERU WERK RUPRECHT GMBH CO A·Filed 1986·Granted Jan 3, 1989·44 cites·22 claims
- 0678US5599180ACircuit arrangement for flame detectionBERU WERK RUPRECHT GMBH CO A·Filed 1994·Granted Feb 4, 1997·50 cites·16 claims
- 0770US4751430ASpark plug connector having transformer, capacitor, and spark gapBERU WERK RUPRECHT GMBH CO A·Filed 1986·Granted Jun 14, 1988·28 cites·10 claims
- 0869US4556781ASelf-regulating electric glow plugBERU WERK RUPRECHT GMBH CO A·Filed 1984·Granted Dec 3, 1985·23 cites·4 claims
- 0968US5093555AGlow plug having cobalt/iron alloy regulating filamentBERU WERK RUPRECHT GMBH CO A·Filed 1989·Granted Mar 3, 1992·17 cites·10 claims
- 1061US5510667ASpark plug with an electrode having a platinum-nickel fiber composite materialBERU WERK RUPRECHT GMBH CO A·Filed 1993·Granted Apr 23, 1996·24 cites·10 claims
- 1161US5091631AGlow plug having a series connection of resistant filamentsBERU WERK RUPRECHT GMBH CO A·Filed 1989·Granted Feb 25, 1992·20 cites·16 claims
- 1261US4727891AIgnition systemBERU WERK RUPRECHT GMBH CO A·Filed 1986·Granted Mar 1, 1988·12 cites·7 claims
- 1359US4771210ASpark plug with electrodes having noble metal insertsBERU WERK RUPRECHT GMBH CO A·Filed 1987·Granted Sep 13, 1988·25 cites·6 claims
- 1456US5172664AIncandescent plugBERU WERK RUPRECHT GMBH CO A·Filed 1991·Granted Dec 22, 1992·18 cites·17 claims
- 1554US5521356AGlow plug with construction for minimizing heat transfer between interior pole and PTC regulating elementBERU WERK RUPRECHT GMBH CO A·Filed 1992·Granted May 28, 1996·17 cites·17 claims
- 1651US5402757AFlame glow unitBERU WERK RUPRECHT GMBH CO A·Filed 1993·Granted Apr 4, 1995·15 cites·14 claims
- 1746US5645742AGlow plug with zirconium dioxide coating and nicraly adhesive layerBERU WERK RUPRECHT GMBH CO A·Filed 1994·Granted Jul 8, 1997·13 cites·7 claims
- 1845US5377440AFlame starting unit for a combustion deviceBERU WERK RUPRECHT GMBH CO A·Filed 1993·Granted Jan 3, 1995·16 cites·15 claims
- 1944US5468933ARod flame glow plug having a CoFe alloy regulating coil and a housing having a fuel connection for a metering deviceBERU WERK RUPRECHT GMBH CO A·Filed 1994·Granted Nov 21, 1995·11 cites·13 claims
- 2042US5500304ASilver-nickel composite material for electrical contacts and electrodesBERU WERK RUPRECHT GMBH CO A·Filed 1995·Granted Mar 19, 1996·8 cites·5 claims
- 2140US5880433ARod-type flame glow plugBERU WERK RUPRECHT GMBH CO A·Filed 1997·Granted Mar 9, 1999·9 cites·6 claims
- 2235US5937814AFlame starting device for an internal combustion engine and process for operating the flame starting unitBERU WERK RUPRECHT GMBH CO A·Filed 1997·Granted Aug 17, 1999·9 cites·14 claims
- 2335US5626781AGlow plug with protective coatingBERU WERK RUPRECHT GMBH CO A·Filed 1996·Granted May 6, 1997·7 cites·9 claims
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