FR1337227A
(en )
1963-09-13
Improvements to radiolocation systems
BE608414A
(en )
1962-03-22
Improvements to telecommunication systems.
BE611283A
(en )
1962-06-08
Improvements to telephone systems
FR1241954A
(en )
1960-09-23
Improvements to prefabricated construction systems for buildings
BE600933A
(en )
1961-07-03
Improvements to false ceilings.
FR1238546A
(en )
1960-08-12
Improvements to panel construction systems
FR73067E
(en )
1960-09-22
Improvements to telephone systems
BE584464A
(en )
1960-05-09
Improvements to building construction systems.
FR1194675A
(en )
1959-11-12
Improvements to pumping systems
FR1196729A
(en )
1959-11-25
Building systems
BE576788A
(en )
1959-07-16
Improvements to track systems.
BE573808A
(en )
1959-06-12
Improvements to telecommunication systems.
FR1233478A
(en )
1960-10-12
Improvements to transport systems
FR1226045A
(en )
1960-07-06
Cine-diographic systems
FR1210986A
(en )
1960-03-11
Improvements to telephone systems
FR1220244A
(en )
1960-05-23
Improvements to cathode systems
FR1164689A
(en )
1958-10-13
Improvements to pumping systems
BE575519A
(en )
1959-05-29
Improvements to radiocommunication systems.
FR1225684A
(en )
1960-07-04
Improvements to control systems
BE580579A
(en )
1959-11-03
Improvements made to scaffolding.
BE574901A
(en )
1959-05-15
Improvements to heating systems.
FR1225675A
(en )
1960-07-04
Improvements to cathode systems
FR1310504A
(en )
1962-11-30
Improvements to radar systems
FR1214708A
(en )
1960-04-11
Improvements to coupling systems
FR1257147A
(en )
1961-03-31
Improvements to amplifier-demodulator systems