Growing community of inventors

Chicago, IL, United States of America

Roman A Tojza

Average Co-Inventor Count = 1.78

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 = 181

Roman A TojzaDonald E Hooker (6 patents)Roman A TojzaWalter M Burnside (1 patent)Roman A TojzaRoman A Tojza (8 patents)Donald E HookerDonald E Hooker (15 patents)Walter M BurnsideWalter M Burnside (9 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Bally Manufacturing Corporation (8 from 93 patents)


8 patents:

1. 4447058 - Game gate device

2. 4443209 - Gaming apparatus having manually controllable-operating speed

3. 4440036 - Gaming apparatus having manually controllable operating speed

4. 4433844 - Drive mechanism for a variable speed gaming device

5. 4430903 - Gaming apparatus having manually controllable operating speed

6. 4427196 - Rotatable reel indexing having shock absorbing capability

7. 4373727 - Variable speed gaming device

8. 4155437 - Transport device for game machine

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1/3/2026
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