Growing community of inventors

Idkerberget, Sweden

Per-Ake Hellman

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 = 9

Per-Ake Hellman ↔ Lennart Stenstrom (1 patent)Per-Ake HellmanPer-Ake Hellman (1 patent)Lennart StenstromLennart Stenstrom (8 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Asea Aktiebolag (1 from 414 patents)


1 patent:

1. 4547831 - Surge arrester

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as of
12/6/2025
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