Safe Child Car Seats Best Safety Car Seats For Your Child – 2010

19Apr/13Off

Walk&Roll Stairs! Alternative ramp-rails for trolleys, hand trucks, baby strollers, wheelchairs,..


These alternative stairs can be climbed as standard stairs or alternating tread stairs, and they're also useful as ramp-rails for trolleys, baby strollers, h...

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  1. Hello, Nic J.!
    R&D investment: just a lot of CAD work… and patent fees, of course
    Prototyping: 1000$

  2. Seriously…
    How much have you invested into the Walk&Roll Stairs…?
    If you don’t mind me asking.


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