AT108190B
(en )
1927-12-10
Equipment for signaling and telephoning on cable cars.
FR633683A
(en )
1928-02-02
Signaling device
FR611862A
(en )
1926-10-13
Signaling device for vehicles
FR649762A
(en )
1928-12-27
Signaling device for vehicles
CH143558A
(en )
1930-11-15
Signaling device for line signals.
FR601860A
(en )
1926-03-09
Signaling device for cars
AT108973B
(en )
1928-02-25
Cable entry for telecommunication centers.
FR631566A
(en )
1927-12-22
Signaling device for vehicles
CA265230A
(en )
1926-10-19
Signalling apparatus
CA263760A
(en )
1926-08-24
Signalling apparatus
DK36364C
(en )
1926-08-16
Railway signaling device.
AT112308B
(en )
1929-02-25
Device for the trouble-free disconnection and removal of series transformers from the line.
FR630440A
(en )
1927-12-02
Signaling device
FR610890A
(en )
1926-09-15
Signaling device for automobiles
FR619265A
(en )
1927-03-30
Signaling device for automobiles
FR625403A
(en )
1927-08-10
Signaling device for automobiles
FR631373A
(en )
1927-12-19
Signaling device for vehicles
FR646346A
(en )
1928-11-09
Signaling device for vehicles
FR664076A
(en )
1929-08-29
Signaling device for vehicles
FR32528E
(en )
1928-01-24
Equipment for refloating sunken submarines
DK35476C
(en )
1926-01-04
Train safety and signaling system.
DK39489C
(en )
1928-11-19
Automatically acting Railway boom.
CA258525A
(en )
1926-03-02
Selective information apparatus
CA266475A
(en )
1926-12-07
Lines guard
FR604957A
(en )
1926-05-17
Improvements in artificial couplings for telegraph cables with amplifying devices