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A patent application or patent may contain drawings, also called patent drawings, illustrating the invention, some of its embodiments (which are particular implementations or methods of carrying out the invention), or the prior art. The drawings may be required by the law to be in a particular form, and the requirements may vary depending on ...
The motor provides the power, turning the generator at a constant speed, and the signal to be amplified is applied to the generator's field winding. The higher the current applied to the winding, the stronger the magnetic field and thus the higher the output voltage of the generator. So the output voltage of the generator is an amplified copy ...
The product was named Otis King's Patent Calculator, and was manufactured and sold by Carbic Ltd. in London from about 1922 to about 1972. With a log-scale decade length of 66 inches, the Otis King calculator should be about a full digit more accurate than a 6-inch pocket slide rule.
It follows that all the steps of the ’270 patent are routine and []conventional. To allow the claim to survive would disproportionately risk preempting a building block of human interaction, retarding rather than promoting progress, contrary to the very purpose patents are granted. The court thereafter held the patent invalid.
The original 1846 patent drawing was discovered in the Patent and Trademark Office of the director in 1997. [29] Its only omission is the usually required inventor's signature in a lower corner. [30] The Smithsonian Institution acquired about 10,000 patent models, including Lincoln's.
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