Average Co-Inventor Count = 2.29
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. Plus Stationery Corporation (3 from 38 patents)
2. Dena Co., Ltd. (1 from 166 patents)
4 patents:
1. 9039525 - Game providing device, game providing method and non-transitory computer-readable storage medium storing game program
2. D619175 - Paper punch
3. D612890 - Hole punch for stationery
4. D598957 - Hole punch for stationery