Inventor · disambiguated record
David D. Kaufman
Also filed as: KAUFMAN DAVID D
2 granted patents·580 citations·filing 1990–1990
74Inventor score
Technology areasH04M
Files withAT & T BELL LAB2
Top patents by PatentIndex Score
2 records- 0190US5003584AMethod and apparatus for the billing of value-added communication callsAT & T BELL LAB·Filed 1990·Granted Mar 26, 1991·406 cites·40 claims
- 0287US5187710AMethod and apparatus for the billing of value-added communications callsAT & T BELL LAB·Filed 1990·Granted Feb 16, 1993·174 cites·36 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →