Growing community of inventors

Thousand Oaks, CA, United States of America

Robert William Engel

Average Co-Inventor Count = 1.47

ph-index = 8

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 = 242

Robert William EngelWilliam J Kelley (3 patents)Robert William EngelJohn Rey Hollis (3 patents)Robert William EngelRobert Stephen Lee (3 patents)Robert William EngelSteve G Fouke (2 patents)Robert William EngelJoseph W Franke (1 patent)Robert William EngelEnis J Unalp (1 patent)Robert William EngelJohn R Grube (1 patent)Robert William EngelStephen George Fouke (1 patent)Robert William EngelAlex R Piyevsky (1 patent)Robert William EngelRobert William Engel (13 patents)William J KelleyWilliam J Kelley (34 patents)John Rey HollisJohn Rey Hollis (13 patents)Robert Stephen LeeRobert Stephen Lee (3 patents)Steve G FoukeSteve G Fouke (2 patents)Joseph W FrankeJoseph W Franke (2 patents)Enis J UnalpEnis J Unalp (1 patent)John R GrubeJohn R Grube (1 patent)Stephen George FoukeStephen George Fouke (1 patent)Alex R PiyevskyAlex R Piyevsky (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Other (12 from 832,891 patents)

2. Mattel, Inc. (1 from 1,703 patents)


13 patents:

1. 7326101 - Switching arrangements and accessories capable of activation by air

2. 6852000 - Beach wave playset

3. 6776682 - Acrobatic doll and doll accessories capable of activation by air

4. 6346024 - Bath toy with thermally erasable drawing surface

5. 6168494 - Expandable and changeable playset building system

6. 5806768 - Inflatable water toy

7. 5679047 - Vibratory toy and game apparatus

8. 5672057 - Spin art device having inflatable components

9. 5085610 - Dual sound toy train set

10. 4438579 - Three-dimensional picture with interchangeable scenes

11. 4431155 - Cover sleeve for shelving brackets of the blade type

12. 4343476 - Playing piece for a board game

13. 4169323 - Means for producing multi-colored hobby craft designs

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as of
12/31/2025
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