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Charles John Robertson (1860-1909)
1871 His father was a bullion dealer and refiner
Attended Charterhouse and Merchant Taylors Schools
c.1878 3 year course at Finsbury Technical College
1881 Pupil in lamp department of Brush Co
1881 Living with his widowed mother in Highbury, a bullion dealer and jeweler, as was Charles and his brothers 
1883 Assistant manager of lamp department of Pilsen-Joel and General Electric Co
1884 Manager of the lamp department
1885 Manager of the Bernstein Co
1886 Equipped and managed a works in the Netherlands
1886 of Madeley Road, Ealing, London W, became an associate of the Inst Electrical Engineers
Around 1890 he was considered for a senior position by Philips in the Netherlands but was not offered the position; instead he went to Vienna and over the next 2 years established the "Watt" lamp works
1891 In partnership in Vienna; designed and equipped works; afterward produced the "Watt" lamp
1900 Member of IEE; Technical and managing director of Incandescent Lamp Co
1901 Engineer, of Ealing, joined The Masons
1909 October. Died. 'Mr. Charles Robertson, inventor of the Robertson electric lamp, has died at his residence at Ealing. Mr. Robertson, who was only forty-nine, started an electric lamp factory Hammersmith in 1892, and large business was built up.'
1910 Obituary 
CHARLES J. ROBERTSON was born in 1860, and educated at the Merchant Taylors' School, where he gained a scholarship at St. John's College, Oxford.
He afterwards studied chemistry under Professor Armstrong, and electrical engineering under Professors Ayrton and Perry at Finsbury Technical College.
His connection with the lamp-making industry commenced in 1881, when he joined the Anglo-American Brush Company, and was associated with Mr. St. John Lane-Fox, one of the pioneers of the lamp industry.
After working with various lamp companies in London and on the Continent and devoting considerable time to research work, he formed the Robertson Incandescent Lamp Company at Brook Green, and was manager and technical director until the time of his death, which took place on October 11, 1909.