Average Co-Inventor Count = 2.00
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. Office Depot, Inc. (3 from 19 patents)
2. Beifa Group Co., Ltd. (1 from 443 patents)
4 patents:
1. D612425 - Writing instrument
2. D604362 - Writing instrument
3. D603899 - Writing instrument
4. D569905 - Pen