Average Co-Inventor Count = 2.53
ph-index = 4
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. The Scott-fetzer Company (4 from 257 patents)
4 patents:
1. D328166 - Handle extension for a vacuum cleaner
2. D320491 - Vacuum cleaner
3. 4692754 - Rotation indicating device
4. 4514199 - Vacuum cleaner dirt box