Average Co-Inventor Count = 1.20
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 (3 from 1,246 patents)
3 patents:
1. 4343253 - Lid and hinge arrangement for a convertible sewing machine
2. 4241472 - Carrying handle for a sewing machine
3. 4204493 - Sewing machine bed extension latch