Dating By Patent Numbers

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Some patent numbers , as displayed in the table, are 7 characters with the numeric portion padded with leading zeroes . Some numbers within a series may be unused . Therefore, the number of patents granted during a year cannot be determined by simply subtracting the number of the first patent issued in one year from the number of the first patent issued in the next year .
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 1948 2433824 D148267 PP00774 RE22957 1949 2457797 D152235 PP00818 RE23068 1950 2492944 D156686 PP00911 RE23186
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 .
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 .phoenixmasonry .org › masonicmuseum › US_Patent_Dating_Chart .htm
Patent Number : Year : Patent Number : Year : Patent Number : Year: 1: 1836 : 333,494: 1886 : 2,026,516: 1936: 110: 1837 : 355,291: 1887 : 2,026,516: 1937: 546: 1838 : 375,720: 1888 : 2,066,309: 1938: 1,106: 1839 : 395,305: 1889 : 2,104,004: 1939: 1,465: 1840 : 418,665: 1890 : 2,142,080: 1940: 1,923: 1841 : 443,987: 1891 : 2,185,170: 1941: 2,413: 1842 : 466,315: 1892 : 2,227,418: 1942: 2,901: 1843 : 488,976: 1893 : 2,268,540: 1943: 3,395: 1844 : 511,744: 1894
Patent figures from 1820 to date . Request for numbers of patents for each year since 1820 . From: Intellectual Property Office . Published . 12 August 2016 .
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 .
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 .
I searched patent number info and if I'm understanding it correctly, this patent number 1852188 indicates the patent was issued in 1932, so the piece would likely have been made in the early 30's . Is that correct? The deco elements on the ends seem to support that period also . Anybody know anything else about this piece?
antiquebottles .com › dating .html
If your bottle is American and has a patent number , check out this Table of U .S . Patent Numbers to help date your bottle . Also see the US Patent and Trademark Office where you can do a search to find more info on a US Patent . If your bottle is English and has a registration number , check out this Dating English Glass page that shows the year for each registration number between 1876 and 1920 .
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Dating By Patent Numbers

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