SJ

Samuel J. B. Johnston

EM Emi: 3 patents #13 of 137Top 10%
Overall (All Time): #1,681,250 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4435266 Electroplating arrangements 1984-03-06
4349499 Disc record preparation 1982-09-14
4269669 High speed electroplating William Soby 1981-05-26