Average Co-Inventor Count = 4.61
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. Seiko Epson Corporation (4 from 33,464 patents)
4 patents:
1. 7090344 - Ink cartridge for use in an ink jet recording apparatus
2. 6899417 - Ink cartridge for use in an ink jet recording apparatus
3. D442221 - Ink cartridge for printer
4. D440600 - Ink cartridge for printer