John D. Slingwine has been granted 7 US patents while listed as an inventor at Sequent Computer Systems. The first was granted in 1995 and the most recent in March 2014. John D. Slingwine ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list John D. Slingwine in Beaverton, OR, US.