Average Co-Inventor Count = 3.46
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. Philip Morris Management Corp. (2 from 4 patents)
2. Philip Morris Inc. (1 from 759 patents)
3 patents:
1. 5037459 - Device for controlling relative humidity within a substantially sealed
2. 5035731 - Device for controlling relative humidity within a substantially sealed
3. 4687008 - Filter cigarette