Average Co-Inventor Count = 2.71
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.
Company Filing History:
1. Tonka Corporation, Kenner Division (2 from 2 patents)
2. Other (1 from 832,812 patents)
3. Tonka Corporation (1 from 47 patents)
4 patents:
1. 5452889 - Ball striking device
2. 5156684 - Air brush set
3. 4895548 - Collapsible construction set
4. 4459056 - Disposable pencil structure and method of sharpening pencil head