Average Co-Inventor Count = 3.57
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. Harper Brush Works, Inc. (5 from 15 patents)
5 patents:
1. D641116 - Nesting bucket
2. D636139 - Jumbo debris pan
3. D630857 - Utility scrub brush
4. D628468 - Clip for attachment to a broom
5. D622134 - Top broom clip