The [[Chilton]] however does not seem to be the only manufacturer to have used this system, in fact a substantially identical system called [[Compressor]] was invented by [[Montblanc]] in 1923 (patent {{Cite patent|DE|400356}}) and used from 1924 to 1929 for some models, which however were marketed on a small scale (mainly in France) and did not have a significant success.<noinclude>
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The [[Chilton]] however does not seem to be the only manufacturer to have used this system, in fact a substantially identical system called [[Compressor]] was invented by [[Montblanc]] in [[1923]] (patent {{Cite patent|DE|400356}}) and used from [[1924]] to [[1929]] for some models, which however were marketed on a small scale (mainly in France) and did not have a significant success.<noinclude>