Average Co-Inventor Count = 3.75
ph-index = 1
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. Toyo Roki Seizo Kabushiki Kaisha (2 from 41 patents)
2. Honda Giken Kogyo Kabushiki Kaisha (1 from 10,092 patents)
2 patents:
1. 6230900 - Filter assembly and process for producing the same
2. 5538633 - Filter apparatus having a casing with improved structure for holding