Average Co-Inventor Count = 2.53
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. Dittler Brothers Incorporated (4 from 35 patents)
4 patents:
1. 5981040 - Holographic imaging
2. 5601887 - Embossed card
3. 5569512 - Card with integrated overprinting
4. 5532046 - Simulated foil card