Average Co-Inventor Count = 1.29
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. Quadrum Telecommunications, Inc. (3 from 18 patents)
3 patents:
1. D330209 - High security telephone instrument
2. 5086465 - Armored telephone cord retention bracket
3. 5064116 - Coin hopper relay