David J. Stein has been granted 23 US patents while listed as an inventor at Beertubes.Com. The first was granted in 1994 and the most recent in July 2023. David J. Stein ranks #178,160 of 4,157,543 US inventors in our database (top 4.3%). Patent records list David J. Stein in New Port Richey, FL, US.