Average Co-Inventor Count = 5.05
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. Sanyo Electric Co., Ltd. (4 from 8,777 patents)
4 patents:
1. 7350263 - Electric vacuum cleaner
2. 7337493 - Upright-type electric vacuum cleaner with detachable dust collector
3. 5907889 - Vacuum cleaner
4. 5768746 - Electric vacuum cleaner