Average Co-Inventor Count = 1.33
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. The Pilot Ink Co., Ltd. (2 from 175 patents)
2. Kabushiki Kaisha Pilot Corporation (2 from 174 patents)
4 patents:
1. D494219 - Mechanical pencil
2. D489088 - Ball-point pen
3. D484537 - Ball-point pen
4. D403704 - Ballpoint pen