CH36521A
(en )
1907-01-31
Alternating current meter based on the Ferraaris principle
CH37904A
(en )
1907-08-31
Measuring device based on the Ferraris principle
FR371293A
(en )
1907-03-04
Induction electricity meter
FR7239E
(en )
1907-06-13
Induction electricity meter
CH27948A
(en )
1904-03-15
Alternating current meter based on the Ferraris principle
FR408083A
(en )
1910-03-17
Tailor's Meter
FR381322A
(en )
1908-01-09
Electricity meter
CH46352A
(en )
1910-03-01
Alternating current meter based on the Paalzow-Rubens bolometer principle
CH46204A
(en )
1910-02-16
Electric pendulum meter
FR368311A
(en )
1906-11-24
Prepayment electricity meter
FR384744A
(en )
1908-04-18
Multiple tariff electricity meter
ES39187A2
(en )
1906-11-01
An electrolytic electricity meter called the "Hispania" electricity meter.
ES38461A2
(en )
1906-07-16
An electrolytic electricity meter called the "Hispania" electricity meter.
ES35413A2
(en )
1905-07-16
An electrolytic electricity meter called the "Hispania" electricity meter.
CH44544A
(en )
1909-08-16
Shunt electromagnet for electricity meters based on the Ferrarian principle
AT29982B
(en )
1907-09-25
Alternating current meter based on Ferrari's principle with movable end pieces in the magnetic fields
FR365299A
(en )
1906-09-06
Stair construction
ES45461A1
(en )
1909-06-16
An alternating current meter according to the "Ferraris" principle.
FR357238A
(en )
1905-12-21
Electricity meter
FR355561A
(en )
1905-11-07
Electricity meter
CH46458A
(en )
1910-03-16
AC current meter
CH25516A
(en )
1903-05-31
Electricity meter based on the Ferraris principle
FR403414A
(en )
1909-11-04
Water meter
ES46089A1
(en )
1909-10-16
Electrical apparatus called "Electropyreion".
FR373942A
(en )
1907-05-30
Alternating current switch-rectifier