Dating british patent numbers
If a technical specification for any of these patents was found, then its text was transcribed in full and engravings were made of any drawings.If no specification was found, then just the details of the grant recorded in the Patent Rolls were transcribed.This tends to protect the use of these marks, and in general restricts them to use on pieces made in the UK.This protects both collectors and the companies who registered the marks.Wine coolers and soup tureens and their liners are often such numbered, with the proper way of assembly (after cleaning) in mind. B- Inventory numbers with two parts were used for sets of plates and flatware, as for example in Lot 98 'A set of twelve German Silver Dinner plates, J. Drentwett I, Augsburg 1755-57' is numbered with 33-1 to 33-12. Lot 84 'A German silver-gilt dessert service, Johann Beckert V, Augsburg 1757 '59' consisting of forty-two dessert spoons, forty-two dessert forks and forty-two dessert knives with silver blades and are stamped with inventory numbers: 9-1 to 12, 10-1 to 12, 11-1 to 12 and 12-1 to 6. Deviations from the scratch weight are indicators for alterations: A conversion from a teapot into a (much higher prized) tea caddy by removing the spout and handle, conversion from a larger mug to a teapot, added borders, spouts, handles: the examples are endless.Fig.2 shows a beautiful entre dish by Mortimer and Hunt, London 1843, the lid does not quite fit and the numbers on body and lid '1 and 4' tell the rest of the story. The fact, that they are numbered with 13, 14, 18, 20, 21 and 22 proves that there must have been 24 or more at one time. (note 3) Many but by far not all early silver pieces have weights scratched in underneath. Additions on English silver pieces are of course marked with contemporary hallmarks, but sometimes one has to really look hard for these in elaborate borders and handles.Steve van Dulken (Information Expert at the British Library) published an informative blog on patents and other forms of intellectual property (trade marks, designs and copyright).In April 2013 he retired from the British Library and began "The Patent Search Blog".
Before October 1852, details of granted English patents were simply recorded (enrolled) in the Patent Rolls at the end of a long, cumbersome and costly application process. The details recorded in the Rolls usually included the name, rank and address of the patentee, the title of the invention, a formal recitation of the terms of the monopoly (patent) granted and the date of grant.The transcribed text of each patent and any drawings was then printed and published as a numbered pamphlet.This guide is a brief introduction to searching for historical Australian and overseas patents.An article giving more info about all these numbers seemed like a good idea. Due to the common and unfortunate practice of splitting up table and flatware services at auction sales or between family members, 'pairs' with the numbers 3 and 4 might be offered. This practice was amply illustrated in the Thurn and Taxis Collection.A 'pair' with the numbers 1 and 2 might be a true pair or the first ones in a series of a larger number of items. (note 2) Two different systems have been used: A- Consecutive numbers for multiples of the same items, like for example Lot 87, 'A set of six German silver meat dishes, J. Drentwett I, Augsburg 1755-5' is numbered with the inventory number 1 - 6, Lot 121: 'A set of eight German silver table candlesticks, Daniel Schaeffler I, Augsburg, apparently 1712-15, one lacking inventory number, the others: 77, 78, 79, 81 to 84, also engraved with scratch weights.' Consecutive numbers were also used for ice pails, set of salts, casters, etc. To understand scratch weights and to correctly convert them to today's weights is of utmost importance for the collector.
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Most collectors are familiar with termini technici like scratch weight, British registration mark, etc.