These knives are various blade patterns of knives used for graftage or the joining of plant tissue to continue their growth together. They are used in Horticulture and Agriculture trades to propagate commercially grown plants.  I think these are all of the patterns known. It appears that each blade pattern has a specific purpose. The celluloid blades on the end of the two models are called bark lifters. Puma was a rare maker of these knives.