[fertel]

Looks like these are the 3 patents in question:

http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/235...

http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/248...

http://brevets-patents.ic.gc.ca/opic-cipo/cpd/eng/patent/247...