Keith E. Schubert has been granted 25 US patents while listed as an inventor at Pitney Bowes. The first was granted in 1980 and the most recent in April 2024. Keith E. Schubert ranks #158,593 of 4,157,543 US inventors in our database (top 3.8%). Patent records list Keith E. Schubert in Darien, CT, US.