It looks like leaf blowers originated in the mechanisation of farming, so perhaps there was a legitimate labour saving objective there. In the case of sink waste disposal, I&#x27;d be pretty surprised if there was a good reason.<p>Hamilton Beach is an example of an early 20th C manufacturer that made a lot of consumer products which used similar motors, for example a now-classic catering-grade blender for milkshakes. That seems like a clear example of a market being created by the development of the device, which itself existed to apply a technology (the motor).<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hamilton_Beach_Brands" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hamilton_Beach_Brands</a>