Average Co-Inventor Count = 2.23
ph-index = 6
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. Silver Seiko Ltd. (13 from 54 patents)
13 patents:
1. D313239 - Typewriter
2. D306249 - Combined paper folder and envelope opener or similar article
3. D305775 - Copying machine
4. D300434 - Typewriter
5. D299249 - Typewriter
6. D299248 - Typewriter
7. D297714 - Score collector for base-ball game
8. D291323 - Typewriter
9. D291208 - Print wheel cartridge for typewriter
10. D290616 - Typewriter
11. D286057 - Ribbon cassette for typewriter
12. D284771 - Menu printer
13. D273117 - Typewriter for European languages