Average Co-Inventor Count = 3.64
ph-index = 2
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. Hallmark Cards, Inc. (8 from 233 patents)
8 patents:
1. 11854436 - Greeting card lever and spiral lift
2. 11514820 - Greeting card lever and spiral lift
3. 11004361 - Flexible drive shaft for greeting cards and the like
4. 10984680 - Greeting card lever and spiral lift
5. 10515568 - Flexible drive shaft for greeting cards and the like
6. 10089904 - Flexible drive shaft for greeting cards and the like
7. 9830836 - Flexible drive shaft for greeting cards and the like
8. 8881439 - Greeting card with spinner activated multimedia content