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(d) - data for 1836 include 599 patents issued prior to July 4, the effective date of the 1836 patent law (e) - "Patents", as used in this column, refers to "patents for inventions", also known as "utility" patents Data Sources (a) - recent statistics are obtained from the report, U.S. Patent Statistics Report, U.S. Patent and Trademark Office ...
Collectors and enthusiasts alike are willing to pay high prices or even top dollar for well-preserved, authentic pieces. Here are five valuable 1970s collectibles you might just have stored in ...
New Britain Machine Company also supplied many companies, this list includes Mac Tools, Matco Tools, Giller, J. C. Penney (Penncraft), Owatonna Tools Company, American Forge, and PowerKraft. In 1957, Luther Kilness filed patent numbers 2,554,990 [ 3 ] and 2,981,389 [ 4 ] with the United States Patent Office .
Most of the old stock numbers can be deciphered by using the numbering key explained below. Some older pocketknife numbers have a zero inserted just before the pattern number to signify a modification, usually in material or finish, such as (9393 or 93093) The first digit signifies handle material as follows: 2 – imitation pearl
While used units start around $70, those in mint condition or with original packaging can command prices upwards of $2,000, especially among retro gaming enthusiasts. 4. Atari 2600.
Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.
Griswold cast-iron pots and pans, skillets, dutch ovens, and other kitchen items had a reputation for high quality, and they are well known to antique collectors and sellers. The easily recognized "cross" logo seen on Griswold products from the 1910s through the 1960s was modified several times over the years.
On 27 March 1905 Henry Sandell filed an application for a United States patent for an electric self playing violin. The patent was granted, as number 807,871, on 19 December 1905 and assigned to Mills Novelty Company. [31] This forerunner of the Violano-Virtuoso was known as the Automatic Virtuosa. It was marketed in 1905.