Average Co-Inventor Count = 3.18
ph-index = 9
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. Werner Co. (7 from 217 patents)
2. R. D. Werner Co., Inc. (6 from 21 patents)
13 patents:
1. 6142255 - Ladder, member for connecting a rail to a horizontal element of a
2. D422717 - Ladder top
3. D413990 - Front face of a ladder top
4. 5791439 - Ladder, member for connecting a rail to a horizontal element of a
5. 5636706 - Ladder, member for connecting a rail to a horizontal element of a
6. 5573081 - Ladder top with bail recess
7. 5366051 - Hollow plastic ladder
8. 5358070 - Ladder top
9. 5259480 - Ladder top
10. D340773 - Ladder top
11. D340291 - Ladder pail shelf
12. 5131495 - Hollow plastic ladder
13. 5067589 - Extendable support