Average Co-Inventor Count = 1.50
ph-index = 2
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. Hasbro, Inc. (1 from 496 patents)
2. Sente Creations Co., Ltd. (1 from 7 patents)
2 patents:
1. 5752870 - Line-drawing toy
2. 5311226 - Toy projector