DK57457C
(da )
1940-04-08
Spærremagnet- og Laasemekanisme til Togvejs- og Signalhaandgreb i elektriske kraftdrevne Omstillingsanlæg.
CA368257A
(en )
1937-08-24
Combination meter and time switch
GB608641A
(en )
1948-09-17
Improvements in railway tracks
AU108264B2
(en )
1939-08-24
Improvements in or relating to alternating current signal receiving circuits
AU107453B2
(en )
1939-06-01
Improvements in or relating to railway signal and/ or points control equipment
CA370320A
(en )
1937-11-30
Railway switch lock
AU107448B2
(en )
1939-06-01
Improvements in or relating toa degenerative back-coupled amplifying arrangement
AU105201B2
(en )
1938-09-29
Improvements in signal combining amplifiers
AU344638A
(en )
1939-08-24
Improvements in or relating to alternating current signal receiving circuits
AU210438A
(en )
1939-06-01
Improvements in or relating to railway signal and/ or points control equipment
AU106623B2
(en )
1939-02-23
Improvements in or relating to railway crossings
AU13726A
(en )
1926-06-22
Improvements in crystallisers
ES136210A1
(es )
1935-02-01
Mejoras en los aparatos de medida y de control eléctricos y magnéticos.
AU112842B2
(en )
1941-04-24
Improvements in or relating to electrically operated calculating apparatus
AU203738A
(en )
1939-06-01
Improvements in or relating toa degenerative back-coupled amplifying arrangement
DK57227C
(da )
1940-02-05
Kobling til elektriske Sporskifte- og Signaldrivværker.
AU1069327A
(en )
1928-12-11
Improvements in electrical inductances
AU106075B2
(en )
1938-12-22
Improvements in water-meters
AU104416B2
(en )
1938-07-14
Improvements in electrical signalling arrangements
AU105605B2
(en )
1938-11-03
Improvements in or relating to circuit breakers
AU105279B2
(en )
Improvements in or relating to circuit breakers
AU110616B2
(en )
Improvements in or relating to circuit breaker contact means
AU320426A
(en )
1926-08-16
Improvements in latch mechanism
AU103471B2
(en )
1938-03-24
Improvements in electric totalisator systems
AU104333B2
(en )
1938-07-07
Improvements in night latches