Us Patent Numbers Dating

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Issue Years and Patent Numbers - United States Patent and . . .
PDF Issue Dates and Patent Numbers Since 1836
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Prior to that date, an estimated 9,957 patents had been issued . Defensive Publications (T) and Improvement patents (AI) are not included in this table . (**) Reissue patents were not separately numbered until 1838 . Some patent numbers , as displayed in the table, are 7 characters with the numeric portion padded with leading zeroes .
Table of issue dates and patent numbers , for patents issued since 1836 (*) OPTI/TAF March 18, 2002 < = = = = = = = Patent Document Type = = = = = = = = > Issue 1st 1st 1st 1st (**) 1st Year Utility Design Plant Reissue Statutory Invention 1891 0443987 D020439 RE11137 1892 0466315 D021275 RE11217 1893 0488976 D022092 RE11298 1894 0511744 D022994 RE11397
U . S . Patent Numbers and Corresponding Dates . These dates are a handy reference that you may find useful for figuring out when an item was first produced . For example, if you find something with a patent number of 1,941,448 on it, you will find in the chart below that it was patented in 1933 . Production of the item probably started that year .
www .robinsonsantiques .com › patent .htm
A patent date is when something was patented, not when it was actually made, many items were manufactured for many years after it the patent was granted . These Patent's cover the design of an item, are usually designated with a D in the number . The number for each year is the first design patent issued that year .
www .phoenixmasonry .org › masonicmuseum › US_Patent_Dating_Chart .htm
4,490,885 . 1985 . The United States patent number for each year is the first patent issued that calendar year . Always remember, patent date is only when something was patented, not when it was actually made, many items were manufactured for many years after it was patented .
www .biddingtons .com › content › patentchart .html
United States Patent Dates and Numbers 1836-1990 The United States Patent Office started issuing patent numbers in 1836 . An amazing variety of 19th and 20th century American antiques, jewelry and collectibles are marked with the patent number identifying the year that the object was patented .
www .biddingtons .com › content › investingpatent .html
What follows on this linked Biddington's page is a sort of vintage chart for patented objects: it cross-references the patent number with the year in which the patent was issued . If an item was produced over a long period of time, this chart will tell you the earliest date it could have been made . If an item was only a flash-in-the-pan, then the age becomes quite specific .
Document number : The prefix US indicates that this is a U .S . patent . The B2 code indicates that this patent has a previously published application . 12: Document type ( Patent ) 21: Application number : 22: Date of application: 45: Date of patent : 51: IPC classification: 52
patft .uspto .gov › netahtml › PTO › srchnum .htm
US Patent Full-Text Database Number Search . Query [Help] Utility patents must have numbers entered as seven or eight characters in length, excluding commas, which are optional . Examples: 10,000,000 -- 100000000 -- 6923014 -- 6,923,014 -- 0000001 . Note: Utility Patent 10,000,000 will issue in 2018 .
Patents were issued before 1976 are can only be searched by issue date, patent number , or patent classification . Patents issued in or after 1920 can also be searched by the inventor . Patents issued during or after 1848 were almost always issued on a Tuesday .
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Us Patent Numbers Dating

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