In 1913 Dr.Gotthelf Leimbach founded the company „Gesellschaft zur Erforschung des Erdinnern mbH". This was the ancestor of PHYWE. The official introduction of the trademark PHYWE happened in 1921.
Ploessl, Georg Simon (1794-1868)
Simon Ploessl was born in 1794 in Wieden, in the vicinity of Vienna. He learned the art of woodworking by his father, a cabinet maker and in 1812 he began working at Voigtländer, one of the oldest optical product firms (established in Vienna in 1756 by Johann Christoph Voigtländer). He studied mathematics and optics and founded his own optic laboratory in 1823 at his father's house, at Freundgasse in Vienna. In 1845 36 skilled workmen were under his employment at his laboratory at 215 Feldgasse Street.
Antoine Redier - Paris
Richard Frères, Paris
Société anonyme des établissements Jules Richard
25, rue Mélingue, Paris
The firm Richard, founded in 1858 made mainly barometric instruments
W.J. Rohrbeck's Nachfolger, Wien I., Karntnerstr. 59
Chemistry and physics equipment.
Heinrich Daniel Ruhmkorff (Rühmkorff) (January 15, 1803 in Hanover – December 19, 1877 in Paris) was a German instrument maker who commercialised the induction coil (often referred to as the Ruhmkorff coil.)
Schirmer, Richter & Co, Leipzig
Marc François Louis Secrétan (1804 - 1867), born in Lausanne, professor of mathematics at the Academy of Lausanne, moved to Paris in 1844. In 1845, he joined Lerebours and the firm "Lerebours et Sécrétan" used that name until 1880's and beyond. Sécrétan became head of Lerebours et Sécrétan after 1855.
Short and Maison, London
The company was founded by Werner von Siemens, German engineer working on the telegraph on 1st October 1847.
Joseph Simmons, London