Average Co-Inventor Count = 1.08
ph-index = 7
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. Other (11 from 832,812 patents)
2. Pioneer Industrial Corporation (1 from 17 patents)
3. Hung Mei Brush Co., Ltd. (1 from 3 patents)
13 patents:
1. 8152395 - Pen with adjustable holding structure
2. 7665921 - Offset pen structure for rapid assembling
3. 7001090 - Offset pen
4. 6893178 - Offset pen structure
5. 6161976 - Automatic writing apparatus for segmental writing elements with caps
6. 5479719 - Rolling ruler
7. 5433012 - Rolling rule
8. 5176346 - Suction cup device
9. 5133524 - Suction cup device
10. 5104077 - Suction cup
11. 4805825 - Safety nail driving device
12. 4766675 - Angle measuring instrument
13. 4535542 - Vernier gauge