Leo E. Hakka has been granted 12 US patents while listed as an inventor at Cansolv Technologies. The first was granted in 1991 and the most recent in August 2008. Leo E. Hakka ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Leo E. Hakka in Dollard-Des-Ormeaux, QC, CA.