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Bifocal lenses as a concept were not patented; there are dozens of patents related to bifocals, bifocal contacts, and processes to make bifocals.
The saxophone was invented by Adolphe Sax and he patented it in 1846.
No cheerleading is not patented, it is not able to be patented as it is not an object or product. However cheerleading related clothing items, designs, and toys can be patented
No one has patented the internet
No, braille was never patented.
Doritos were patented in 1966.
Atom patented the first chainsaw. They were also the ones who manufactured the first patented chainsaw. It was patented in 1972.
The 1930s were when the first door chimes were patented, but by 1937 there were 2 major competitors. People continued to purchase door chimes heavily in the 1950s, but by the end of the 1960s, the market for door chimes was pretty much over.
The television was patented in 1922 by Edwin Belin
It has never and can never be patented.
It was patented in 1883
Yes. This is a patented, trademarked product.