Dating british patent numbers

11 Lachenal seems to have been manufacturing for Wheatstone’s on a contract basis, and would have owned the machinery and made the tooling himself.

12 My guess, then, is that the contract probably ran until the beginning of August 1858, when Charles Wheatstone’s Patent, No.

Other sources may vary.) From the passing of the 1891 Mc Kinley Tariff Act, any products imported into the USA were required to show the country of origin. Thereafter ‘Made in England’ was used and this was gradually succeeded by ‘Made in Britain’.

Manufacturers frequently applied these marks to all products rather than just those destined for export.

Wheatstone & Co.’,9 and it is interesting to note that they were only about a quarter of an hour’s walk from Charles Wheatstone’s house, in Lower Mall, Hammersmith, 10 suggesting that he was probably taking an active interest in the venture.

This starts in the year of Mohammed’s flight from Mecca to Medina in the Western year AD 622 and the years are based on the lunar calendar of 354 days.

To convert and adjust for the number of days in the year, the Islamic script can be read for the year using the following number conversions: The conversion formula to use is: Y is the Moslem year The data used has been abstracted from: Jones, Ian, ‘Design Registration Marks’ Ironbridge Gorge Museum Information Sheet No 7, 1981.

The government's idea was to discourage luxury goods during wartime and later post-war shortages.

The tax rates were a fixed percentage of the wholesale price.

Leave a Reply