Some inventions are so ubiquitous that it’s difficult to imagine they started as an idea scribbled on paper and then a patent application. Aluminum foil, adhesive bandages, the ballpoint pen, the computer mouse, the microwave oven — these are just a few examples of great ideas that became indispensable products we now take for granted.
In that spirit, here are few inventions that push the boundaries of innovation. Enjoy them with a caveat: There were people who scoffed at the notion that the motorized carriage would ever replace the convenience of having a horse, and others who figured that nobody would ever need or want to carry a telephone around in their pocket. Enjoy!