Average Co-Inventor Count = 3.20
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. Diesel Kiki Co., Ltd. (3 from 596 patents)
2. Zexel Gmbh (1 from 382 patents)
3. Nihon Parkerizing Co., Ltd. (1 from 128 patents)
4 patents:
1. 5203402 - Heat exchanger
2. 4892135 - Air conditioner for automobiles with hot/refrigeration compartment for
3. 4834170 - Air conditioner for automobiles
4. 4800954 - Laminated heat exchanger