Growing community of inventors

Lemgo, Germany

Karl-Heinz Holzkämper

Average Co-Inventor Count = 2.00

ph-index = 1

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 5

Karl-Heinz HolzkämperHans-Joachim Grajetzky (1 patent)Karl-Heinz HolzkämperBeate Krietenstein (1 patent)Karl-Heinz HolzkämperIgor Neufeld (0 patent)Karl-Heinz HolzkämperKarl-Heinz Holzkämper (1 patent)Hans-Joachim GrajetzkyHans-Joachim Grajetzky (2 patents)Beate KrietensteinBeate Krietenstein (1 patent)Igor NeufeldIgor Neufeld (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Zumtobel Staff Gmbh Co., Kg (1 from 20 patents)

2. Zumtobel Lighting Gmbh (202 patents)

3. Zumtobel Lighting Gmbh & Co. Kg (25 patents)


1 patent:

1. 6883940 - Recessed luminaire having a dome-shaped reflector

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12/21/2025
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