CH2225A
(en )
1890-09-30
Advanced device for measuring electrical units
CH2923A
(en )
1891-04-30
Electrical signal device
CH3336A
(en )
1891-10-31
Advanced instrument for measuring electricity
CH3319A
(en )
1891-09-15
Signal device
CH3075A
(en )
1891-06-15
Advanced electricity meter
CH2180A
(en )
1890-08-30
Advanced electrical measuring instrument
CH3959A
(en )
1892-01-30
Innovation in hot wire measuring instruments
FR354982A
(en )
1905-10-19
Electrical measuring device
CH3091A
(en )
1891-06-30
Air translation device
CH5175A
(en )
1892-11-30
Advanced micrometric measuring instrument
CH3378A
(en )
1891-09-15
Innovation in electrical measuring instruments
CH3515A
(en )
1891-10-15
Typographic device
CH6520A
(en )
1893-09-15
Advanced device for measuring electric currents
FR318570A
(en )
1902-10-18
Further training in thermoelectric devices intended for temperature measurement
CH4329A
(en )
1892-04-30
Unsinkable device
CH5703A
(en )
1893-02-15
Rescue device
CH4286A
(en )
1892-04-15
Knife cleaning device
CH3909A
(en )
1892-01-15
Advanced beer-making device
FR337388A
(en )
1904-04-05
Device for measuring the power factor
CH3987A
(en )
1892-04-15
Electricity meter
CH2320A
(en )
1890-10-15
Counting device
CH4295A
(en )
1892-04-15
Safety device for quick pressing
CH7955A
(en )
1894-07-31
New device for measuring time
CH4136A
(en )
1892-02-29
Adjustable disinfection device
CH3585A
(en )
1891-10-31
Marking device for reed instruments