[78-L] French Pathé questions

[Harold Aherne]

Can anyone provide an approximate idea of how long the following Pathé label designs 
were in use?
 
The "miroir de la voix" (1929-30 at least):
http://www.mgthomas.co.uk/Dancebands/Labels/LabelPhotos/Pathe-French-2.jpg
 
The square w/four segments:
http://dismuke.org/blog/wp-content/uploads/2011/08/PatheSaphirN3377.jpg
 
About when were lateral issues introduced and the vertical ones retired? I think there may
have been some overlap in the formats' availability.
 
Finally, how late was the Pathé name used on records? It was still in use quite a ways
into the microgroove era (as part of the EMI combine, of course, having been acquired
by Columbia Graphophone in 1928).
 
-HA