Average Co-Inventor Count = 2.67
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. Plessey Overseas Limited (2 from 271 patents)
2 patents:
1. 4980924 - HF radio communication systems with frequency management
2. 4939731 - Data transmission system with automatic repeat request