Average Co-Inventor Count = 2.00
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. Ralph's Industrial Sewing Machine Company (4 from 9 patents)
4 patents:
1. 5575226 - Sewing and material removal assembly
2. 5339756 - Material removal device used with a sewing machine
3. 5193471 - Material removal device used with a sewing machine
4. 5158026 - Kit assembly adapted for use with a programmable sewing machine