Growing community of inventors

Annapolis, MD, United States of America

Niels C Holch

Average Co-Inventor Count = 1.45

ph-index = 6

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 = 1,721

Niels C HolchFrank J Riolo (5 patents)Niels C HolchNiels C Holch (8 patents)Frank J RioloFrank J Riolo (9 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Oneida Indian Nation (5 from 13 patents)

2. Other (3 from 832,761 patents)


8 patents:

1. 8579703 - Cashless computerized video game system and method

2. 8235805 - Cashless computerized video game system and method

3. 7695366 - Cashless computerized wager pool game system and method

4. 7329187 - Cashless computerized video game system and method

5. 6280328 - Cashless computerized video game system and method

6. 6089982 - Cashless computerized video game system and method

7. 5800269 - Cashless computerized video game system and method

8. 5674128 - Cashless computerized video game system and method

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as of
12/17/2025
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