Average Co-Inventor Count = 2.67
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. Hallmark Cards, Inc. (4 from 233 patents)
4 patents:
1. 4693541 - Electrical ornamentation system
2. 4682079 - Light string ornament circuitry
3. 4544218 - Electrical ornamentation system
4. 4453743 - Diary with combination-controlled lock