Average Co-Inventor Count = 1.78
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. Greif Bros. Corporation (3 from 37 patents)
2. Greif Brothers Corporation (1 from 3 patents)
4 patents:
1. 5161845 - Lifting and handling device for drums
2. 5018641 - End construction with hollow beam construction for a drum
3. 4951833 - End construction with hollow beam construction for a drum
4. 4135657 - Fiber drum and locking rim assembly