I don't know the details of the legal battles over the EFI patent but each patent cites references to previous tech... like the Polaris EFI patent cites patents from Injection Research Specialists (which is the lawsuit you guys are talking about) as well as Fuji patents.
https://www.google.com/patents/US5479909
just like the BRP cites the Polaris EFI system for their SDI patent.
https://www.google.com/patents/US6691649
Innovation in the snowmobile world really is the company that bundles existing technology into one package the best... so imo, I would say there have been 3 iconic mountain sled technology leaps in the 2000s...
Rev chassis - for rider forward positioning
M7 - deep snow performance
Pro RMK - light weight high performance mountain sled
https://www.google.com/patents/US5479909
just like the BRP cites the Polaris EFI system for their SDI patent.
https://www.google.com/patents/US6691649
Innovation in the snowmobile world really is the company that bundles existing technology into one package the best... so imo, I would say there have been 3 iconic mountain sled technology leaps in the 2000s...
Rev chassis - for rider forward positioning
M7 - deep snow performance
Pro RMK - light weight high performance mountain sled
