Dating british patent numbers
When performing a patent application number search, you will need to know the publication number (e.g. The first four numbers of the publication number represent the year the patent application was published.Publication numbers are often times not placed on a product so you may have to perform a search for the publication number or ask the owner of the pending patent application for the publication number prior to searching for the published patent application. not now available) The National Archives, Kew, Richmond, Surrey, TW9 4DU, United Kingdom tel: 44 (0)20 8876 3444; fax: 44 (0)20 8392 5286.A “patent number search” simply involves searching for a specific patent number. You have to first know what the patent number is which is typically conspicuously placed on a commercial product or its packaging. After you have identified the patent number you want to search for, you then need to access an online patent database where you can enter the patent number.The numbers can be used to assess the first year of manufacture from these approximate figures showing the first numbers issued each year :- (Dating of numbers derived from lists of files held by the British Library ( and The Public Record Office.Numbers after 1933 are taken from the graph below, plotted from PRO files.
Islamic Calendar References Dating of American Patent Numbers The Copyright of Design Act 1842 initiated the use of the diamond registration mark used to confirm that a design has been registered in Britain .
There was a letter to represent the year so the first series ran from 1842 to 1867.
Other letters identified the day and month of registration, the material and bundle number.
10,041 of 8th August 1844 13 (for a term of fourteen years), would have expired.
This would appear to be confirmed by John Crabb having sold the lease of his own house, only a few doors away from the manufactory, on 2nd August 1858.