Growing community of inventors

Chicago, IL, United States of America

Leo F Ludzia

Average Co-Inventor Count = 1.60

ph-index = 4

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 = 392

Leo F Ludzia ↔ Gary L Berge (1 patent)Leo F Ludzia ↔ Romeo M Ishaya (1 patent)Leo F Ludzia ↔ Eugenia Akopian (1 patent)Leo F LudziaLeo F Ludzia (4 patents)Gary L BergeGary L Berge (60 patents)Romeo M IshayaRomeo M Ishaya (1 patent)Eugenia AkopianEugenia Akopian (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Williams Electronics, Inc. (3 from 12 patents)

2. Christiana Industries, Inc. (1 from 5 patents)


4 patents:

1. 5208430 - Position responsive switch

2. D280836 - Video game cabinet

3. D280835 - Video game cabinet

4. D275772 - Amusement game cabinet

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as of
12/11/2025
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