Growing community of inventors

Langenselbold, Germany

Heiko Spengemann

Average Co-Inventor Count = 6.00

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 = 4

Heiko SpengemannOtto W Stenzel (1 patent)Heiko SpengemannHelmut Grof (1 patent)Heiko SpengemannHeinz Kohnert (1 patent)Heiko SpengemannWolfram Diemar (1 patent)Heiko SpengemannLeo Emiljanow (1 patent)Heiko SpengemannHeiko Spengemann (1 patent)Otto W StenzelOtto W Stenzel (21 patents)Helmut GrofHelmut Grof (5 patents)Heinz KohnertHeinz Kohnert (3 patents)Wolfram DiemarWolfram Diemar (2 patents)Leo EmiljanowLeo Emiljanow (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Leybold Aktiengesellschaft (1 from 393 patents)


1 patent:

1. 4993690 - Electroslag remelting plant including an ingot mold and a hood

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idiyas.com
as of
12/15/2025
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