Average Co-Inventor Count = 1.20
ph-index = 4
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. Other (2 from 832,891 patents)
2. Proficient Systems, Incorporated (2 from 7 patents)
4 patents:
1. 5145474 - Children's apparatus for recreation and for learning world geography
2. 5116359 - Head, neck and shoulder therapeutic exercise device
3. 4561240 - Apparatus for retrieving objects from the ground
4. 4434011 - Method and apparatus for retrieving objects from the ground