Average Co-Inventor Count = 3.16
ph-index = 5
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. Hitachi, Ltd. (3 from 42,496 patents)
2. Hitachi Heating Appliances Co., Ltd. (3 from 31 patents)
6 patents:
1. D313919 - Microwave oven
2. D304281 - Microwave oven
3. D280064 - Electric rice cooker
4. D271974 - Television receiver
5. D269676 - Television receiver
6. D266248 - Television receiver