Growing community of inventors

Cape Elizabeth, ME, United States of America

Hansan Ma

Average Co-Inventor Count = 1.20

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 = 98

Hansan MaRandall H Moorman (1 patent)Hansan MaHansan Ma (3 patents)Randall H MoormanRandall H Moorman (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Tonka Corporation (3 from 47 patents)


3 patents:

1. 5253866 - Ball with a passive sound device

2. D322105 - Ball

3. 4919422 - Curve ball

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as of
12/31/2025
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