Average Co-Inventor Count = 1.20
ph-index = 3
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. Kabushiki Kaisha Pilot Corporation (2 from 174 patents)
2. The Pilot Ink Co., Ltd. (1 from 175 patents)
3 patents:
1. D462716 - Ball-point pen
2. D452529 - Container with extendable rod shaped solid
3. D417698 - Writing instrument