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FR59487E
|
|
spark gap with radioactive electrodes
|
|
FR873737A
|
|
Large-range aerial lightning rod
|
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FR854169A
|
|
Taken from the ground
|
|
FR852511A
|
|
Acetaldehyde-based plastic
|
|
FR848937A
|
|
spark gap with radioactive electrodes
|
|
FR846369A
|
|
Radioactive alloy lightning rod
|
|
FR837341A
|
|
Radioactive devices, such as lightning rods
|
|
FR832467A
|
|
Synchronization device for rotating parts
|
|
GB463372A
|
|
Improvements in or relating to processes for manufacturing luminous substances
|
|
GB463764A
|
|
Improvements in or relating to the manufacture of luminescent bodies
|
|
US2084526A
|
|
Luminous plastic substance and its method of manufacture
|
|
FR817197A
|
|
Lightning protection device for aircraft
|
|
FR816475A
|
|
Improvements to luminescent tubes
|
|
FR815265A
|
|
Improvements to metal protection by thermonization
|
|
FR804666A
|
|
Improvement in phosphorescent and fluorescent plastics
|
|
FR46908E
|
|
Luminous plastic material
|
|
FR802627A
|
|
Luminous plastic material
|
|
FR795498A
|
|
Manufacturing process for urea and formaldehyde based material
|
|
FR787608A
|
|
Positive ionization hail
|
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FR764778A
|
|
Improvements to spark plugs for internal combustion engines
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