Average Co-Inventor Count = 2.14
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. Jacobs Chuck Manufacturing Company (5 from 44 patents)
2. Apex Brands, Inc. (2 from 285 patents)
3. Power Tool Holders, Inc. (2 from 112 patents)
9 patents:
1. 9221105 - Drill chuck
2. 8695991 - Drill chuck
3. 8511692 - Drill chuck
4. 8191902 - Drill chuck
5. 7997587 - Drill chuck
6. 7748719 - Drill chuck
7. 7472913 - Drill chuck
8. 6402160 - Chuck with improved bearing
9. 5499828 - Lever bar keyless chuck