Average Co-Inventor Count = 3.16
ph-index = 5
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. Tokai Corporation (4 from 139 patents)
2. Other (1 from 832,843 patents)
5 patents:
1. 5326256 - Igniting device
2. 5322433 - Igniting device
3. 5284439 - Igniting device
4. 5186618 - Gas lighter with safety device
5. 5145358 - Safety device for piezoelectric gas lighter