Average Co-Inventor Count = 1.00
ph-index = 3
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. Grundig Ag (4 from 16 patents)
4 patents:
1. D260255 - Dictating machine
2. D258507 - Telephone answering device-adapter
3. D258058 - Dictating apparatus
4. D258059 - Dictating apparatus