John Robert Siomkos has been granted 14 US patents while listed as an inventor at Rf Micro Devices. The first was granted in 1992 and the most recent in June 2024. John Robert Siomkos ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list John Robert Siomkos in Greensboro, NC, US.