Growing community of inventors

Gerlingen, Germany

Rolf Stiefel

Average Co-Inventor Count = 2.25

ph-index = 2

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 = 49

Rolf StiefelRoland Sawatzki (3 patents)Rolf StiefelUlrich Barth (1 patent)Rolf StiefelRolf Stiefel (3 patents)Roland SawatzkiRoland Sawatzki (3 patents)Ulrich BarthUlrich Barth (6 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Alcatel (3 from 2,503 patents)


3 patents:

1. 6430279 - Method for the acceptance of calling charges for individual calls as well as telephone network and terminal unit

2. 6208722 - Method of accepting charges in individual connections and a telephone network and terminal

3. 6126069 - Chip card, method and system for using and paying for services

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as of
12/26/2025
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