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Palos Verdes Estates, CA, United States of America

William Hart

Average Co-Inventor Count = 1.87

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 = 69

William HartRobin K Smith (1 patent)William HartGordon H Buck (1 patent)William HartMichael T McKittrick (1 patent)William HartJames R Livesey (1 patent)William HartLiliane Davidson (1 patent)William HartHarold A Hartleben (1 patent)William HartKenneth I Amamoto (1 patent)William HartJohn T Benson (1 patent)William HartJerome F Stratman (1 patent)William HartMichael T McKittrick, Jr (1 patent)William HartWilliam Hart (7 patents)Robin K SmithRobin K Smith (11 patents)Gordon H BuckGordon H Buck (9 patents)Michael T McKittrickMichael T McKittrick (6 patents)James R LiveseyJames R Livesey (5 patents)Liliane DavidsonLiliane Davidson (5 patents)Harold A HartlebenHarold A Hartleben (4 patents)Kenneth I AmamotoKenneth I Amamoto (3 patents)John T BensonJohn T Benson (3 patents)Jerome F StratmanJerome F Stratman (2 patents)Michael T McKittrick, JrMichael T McKittrick, Jr (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mattel, Inc. (7 from 1,702 patents)


7 patents:

1. 5096451 - Toy mermaid with voice unit

2. 4750900 - Quick draw mechanism for figure toy

3. 4626224 - Slowly appearing, rapidly disappearing figure toy

4. 4604073 - Take-apart rocking stack toy

5. 4511342 - Winding and launching device for toy vehicles

6. 4251949 - Toy track and bowl with car height indicator

7. 3983662 - Push toy for picking up three-dimensional objects

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as of
12/13/2025
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