Average Co-Inventor Count = 3.69
ph-index = 3
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. Quartet Manufacturing Company (4 from 12 patents)
4 patents:
1. 5662303 - Portable easel having a hollow body
2. 5478040 - Portable easel
3. D352398 - Easel design
4. 5301477 - Panel system