CH36346A
(en )
1906-12-31
Device indicating the presence of foreign gases in the atmosphere
FR386270A
(en )
1908-06-09
Device for indicating the presence of foreign gases in atmospheric air
FR351688A
(en )
1905-07-22
Self-revealing and warning of the presence of asphyxiating gases in general in the atmosphere
CH60883A
(en )
1913-08-16
Device indicating the presence in the air of flammable gases
FR355023A
(en )
1905-10-21
Device activating the evacuation of fumes or gases
FR351324A
(en )
1905-07-11
Device detecting the presence of combustible gases
FR366524A
(en )
1906-10-05
Oxygen generator device
FR366493A
(en )
1906-10-05
Smoke and gas vacuum device
FR429862A
(en )
1911-10-03
Device indicating the presence in the air of toxic or flammable gases
FR381468A
(en )
1908-01-13
Device used to signal the presence of combustible gases in confined spaces
FR372495A
(en )
1907-04-09
Rescue device
FR367168A
(en )
1906-10-22
Rescue device
FR363885A
(en )
1906-08-09
Lifting and weighing device
FR339725A
(en )
1904-06-17
Apparatus intended to indicate the presence or absence of air in the vapor
FR364537A
(en )
1906-08-24
Rescue device
FR353880A
(en )
1905-09-22
Removable and transportable laboratory
FR356721A
(en )
1905-12-07
Gas scrubber
FR351093A
(en )
1905-07-03
Elevator and transporter
FR358998A
(en )
1906-03-13
Concentrator device
FR373473A
(en )
1907-05-16
Improvements to locknuts and locknuts
FR372648A
(en )
1907-04-12
Rescue device
CH42044A
(en )
1908-12-16
Concentration and drying apparatus
FR366849A
(en )
1906-10-12
Device used to turn on and off gas lamps
FR356220A
(en )
1905-11-23
Rescue device
FR353801A
(en )
1905-09-21
Rescue device