Average Co-Inventor Count = 2.67
ph-index = 1
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. Northern Telecom Limited (2 from 2,276 patents)
2 patents:
1. D328072 - Base for a telephone set or similar article
2. 4947424 - Shutter mechanism for telephone directory