Would anyone happen to have the patent number (or better yet a link) to the original transistor patent for electric impulse clocks designed by Léon Hatot of ATO/Hatot in the early 1950's I know this was filed for in mid 1953 (just before Mr Hatot died, Sept 11th 1953), but can not seem to find an application number or if an US patent was also filed, as would be typical. The actual patent application seems to be under the names of Lavet and Dietsch (with assignment to ATO) some web pages I have seen cite them as "...get[ing] the patent for the transistor controlled pendulum clock with the name ATO." I see Mr. Lavert with a watch patent in the 1970s but can not trace him further. And a prior pendulum/impulse design was patented by Leon Hatot in Britain in 1924 (Patent No. 241856), but that one seem to relate to mechanically switched designs and a master-slave distribution system.