Average Co-Inventor Count = 2.40
ph-index = 2
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 Singer Company (2 from 1,246 patents)
2 patents:
1. 4098206 - Electronic motor speed regulating system having adjustable high and low
2. 4066029 - Electromechanical remote cam selector for sewing machines