Average Co-Inventor Count = 2.09
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. Other (3 from 832,912 patents)
2. Penta Inventions, Ltd. (1 from 1 patent)
4 patents:
1. 5046214 - Spool construction and oil dipstick wiper including such construction
2. 4969478 - Portable cigarette ashtray
3. 4919427 - Moebius ring puzzle
4. 4886161 - Container for cigarettes, and cardboard blank for use in making same