Average Co-Inventor Count = 1.80
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. The W. B. Marvin Manufacturing Company (2 from 21 patents)
2. W. B. Marvin Mfg. Co. (1 from 1 patent)
3 patents:
1. 6167196 - Radiant electric heating appliance
2. 6122437 - Electric space heater with swivel mount
3. 4040498 - Insect shield assembly