Looks like these are the 3 patents in question: http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/2353161/summary.html?type=number_search http://brevets

Looks like these are the 3 patents in question: http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/2353161/summary.html?type=number_search http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/235... http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/2485791/summary.html?type=number_search http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/248... http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/2472474/summary.html?type=number_search http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/247...