Average Co-Inventor Count = 2.00
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. Scm Corporation (1 from 478 patents)
2. Smith Corona Corp. (1 from 65 patents)
2 patents:
1. 4865368 - Slide latch gravity lock
2. D290468 - Typewriter lid