Guide to dating royal doulton marks and doulton ceramics including doulton pattern numbers and designs robert allen studio marks h numbers d numbers. 182 rows some patent numbers, as displayed in the table, are 7 characters with the.
This is my uk / gb equivalent of the list presented on that site i have attempted to test the validity of the technique for establishing dates for uk radio sets by cross-referencing various uk radio sets against issue dates for their assosciated patents. A patent number british patents were not issued numbers until october 1852 numbers were then issued retrospectively back to 1617, as well as forward from that time it is highly unlikely that an item made prior to 1852 will have a patent number on it dating a british clock based on its patent may be difficult, but it can be done more information. In 1884 the diamond code was dropped and items were simply stamped with the registered number example [r d n o 224720.
The number listed for each year in table 6 is the first registered design number issued by the uk patent office that year the numbers include all material classes, not just earthenwares to illustrate how to use the table, the ceramic item in the upper left hand corner of figure 5, displaying. Taf report issue dates and patent numbers since 1836: by year -- 1836 to 2001 by issue date -- 1963 - 12/1994 (with addendum for issue dates from 1995. Old bottle identification and dating guide this webpage is intended to help novice collectors and non-collectors better identify, describe. Historical patent searchingsearching _____ a guide to the resources held at newcastle city library contentscontents who needs old patents page 1 uk patent numbering system page 2 information on the internet page 3 old british patent collection at city library page 5 other historical intellectual property resources.
How to look up patent numbers online have you ever run across a bottle, or other antique, with a patent number stamped on it and wondered how you could find out by whom and when it was patented. British charts of old patent numbers british patent number search united states patent and trademark office uk intellectual property information european patent office happy dating jake biddington's collecting series: art appraisals and valuations investment grade contemporary art jake biddington art. Does not include serial numbers 900001 to 902908 these numbers were used on sigma-martins back in 1981-1982 these numbers were used on sigma-martins back in 1981-1982 dating your martin mandolin.
Dating english registry marks starting in 1842, england has offered registration of it's decorative designs for pottery, china, wood, paper, pottery, china. What is a diamond mark during the period 1842-1883 the british patent office issued a diamond mark along with the registration number when a design was registered.
Patent dating - the patent number molded onto the stem changed every time pez, inc made a significant change in the design of the dispenser, and reapplied for a new patent number by looking at the patent number, you can also determine a rough guess of the dispenser's age the patent number timeline is as follows. If your bottle is american and has a patent number, check out this table of us 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. Sewing machine fault finder sewing machine tension problems dating singer sewing machines from serial number main index sir sewalot, fearless protector of.