Average Co-Inventor Count = 2.40
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. Yonezawa Toys Co., Ltd. (1 from 5 patents)
2. Iwaya Kabushiki Kaisha (1 from 1 patent)
3. Iwaya Co., Ltd. (1 from 1 patent)
2 patents:
1. D270258 - Game playing board
2. 4389811 - Bird action toy