Collection Timeline

1892 to 1938

1892
Device for dwellings whose walls are composed of glass boxes

1907
Process of Manufacturing Vegetable Nitrogenous Nutrient

1913
Ways of producing cobalt filaments for electric light bulbs

1914
Improvements in Oscillation Gaps or Discharges for use in Radio-telephony, Radio-telegraphy and like purposes

1918
Process of manufacturing paper-pulp
Improvements in Elastic Tyres
Permanent magnet
Permanent magnet Supplementary patent No 57009

1921
Improvements in the method of making ferro-boron and boron steel
Method of cementing iron and iron alloys with boron
Method of cementing iron and iron alloys with boron
Procedures for the manufacture of iron or steel
Improvements in drawing compasses
Process of treating magnetic sand or pulverized iron ore
Improvements in electric motors

1922
Improvements in knotless netting suitable for fishing and like purposes
Windproof match box

1923
Lead oxides and the process to manufacture the same
Process of extracting vitamin a from fish oils and the like

1925
A method of manufacturing powder of lead suboxide intermingled with powder of metallic lead
Improvements in or relating to incinerating apparatus
Process for preparing highly concentrated sulphur dioxide gas
A catalytic process for producing concentrated and fuming sulphuric acid

1926
Pole shoe attachment for alternators with pronounced poles.

1927
Apparatus for arranging edges of net fabrics in net-making machines
Cutting device for machines for the production of nets without knots
Operating mechanism for net-making machines
A process for preparing pure alumina
Apparatus for aerated-oil injection for internal-combustion engines

1929
Improvements in or relating to processes of extracting oil from vegetable matter
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1930
Arrangement for preventing the corrosion of metal vapour rectifiers
Improvements relating to the casting of metals

1931
Improvements in and relating to fluid-pressure power plants using liquid-air
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1932
Cobalt, chromium and iron containing alloy
Permanent magnet

1933
Permanent magnet
Permanent magnet
Improvements in and relating to fluid-pressure power plants using liquid-air
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Improvements in spindles for net making machines
Improvements in net making machines
Method of manufacturing magnetic iron and steel

1935
Improvements in electric measuring instruments
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Automatic telegraph receiving machine
Automatic telegraph receiving machine
Automatic telegraph receiving machine
Improvements in compound internal combustion engines
Improved method of treating carbonaceous electrode-elements
Method of manufacturing metallic sodium
Method for treating ores by electric high frequency waves

1936
Relay system for measuring the time of the continuous flow of an electric current
Oil pump
Improvements in or relating to television or like electrical image transmitting systems

1937
Improvements in or relating to the manufacture of fertilizers
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Device for compressing or extending the amplitude range of signal currents or voltages
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1938
Improvements in supply systems for high-voltage high-frequency apparatus