Average Co-Inventor Count = 2.31
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. Newell Office Products Inc. (4 from 11 patents)
2. Berol Corporation (1 from 102 patents)
5 patents:
1. D454914 - Desktop file holder side element
2. D423588 - Knob for card file
3. D422633 - Set of index tab index tab file cards
4. D416583 - Card file
5. D414208 - Card file