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San Diego, CA, United States of America

Duane William Zugel

Average Co-Inventor Count = 2.00

ph-index = 3

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 = 25

Duane William ZugelEmanuel H Szumer (3 patents)Duane William ZugelDuane William Zugel (3 patents)Emanuel H SzumerEmanuel H Szumer (10 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kapro Industries Limited (3 from 60 patents)


3 patents:

1. 7117608 - Spirit level

2. 6748666 - Spirit level

3. 6449859 - Spirit level

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as of
12/20/2025
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