Patent Nr. 814
Date
814 is the patent number in the UK for which product?
By the way, the invention was made by Alexander Cumming, a British clockmaker, mathematician, mechanic and organ builder from the 18th century.
Source: https://de.wikipedia.org/wiki/Alexander_Cumming
Photo: https://de.wikipedia.org/wiki/Alexander_Cumming#/media/Datei:Alexander_Cumming_Clockmaker.jpg
