Check out the Leisger CD5:
https://electricbikereview.com/leisger/cd5/
I wonder how this German made e-bike company managed to work around Electra's patented crank forward frame design? The entire frame looks very similar to the Townie models.
Fascinating find, Billy! Thomas and I have been trying to understand the patent protections on crank forward design for some time now, and you found a crank forward frame ebike that looks nearly identical to the patented Electra Townie models. Interesting...
When putting them all side by side it's difficult to understand how Trek and KHS aren't violating the Electra patent. Having owned all three I find it confusing.
Yes, very confusing Thomas. But, don't forget it is already understood that Trek did in fact infringe on the Electra's patent and Electra filed the suit in Northern California district court until Trek made an offer to buy out Electra for a price tag Electra could not refuse:
"Electra claims Trek’s Pure, Pure Lowstep, Pure Sport, Pure Sport Lowstep, Pure DLX, Pure DLX Lowstep, Cruiser Classic, Classic Deluxe, Calypso and Cruiseliner bikes infringe on co-founder Benno Baenziger’s Flat Foot technology, patent #7,740,262. It is seeking compensation for damage to its business caused by Trek’s infringing models.
The Flat Foot patent covers a range of geometry, seat tube and head tube angles intended to create a forward pedaling ride position."
With that being said, the confusing part to me is figuring out how come Trek was sued for infringement, yet an even more identically framed crank forward designed ebike, the Magnum Leisger CD5, has not received a lawsuit for infringement from Electra/Trek?
Makes for a fascinating debate..
Cheers,
Christopher