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The company was founded in [[1918]] in Hanover by Heinrich and Conrad Hartmann, the name is short for ''Gebrüder-Hartmann'' (Hartmann brothers).<ref>Historical data was mainly taken from Werner Rüttinger's [http://www.ruettinger-web.de/geha-startseite.html site] dedicated to [[Geha]] fountain pen production.</ref> The company was founded specializing in the production of material for stationery, especially paper, blocks, carbonless papers and tapes, becoming in the 20s one of the market leaders in stationery postal sales.
The company was founded in [[1918]] in Hanover by Heinrich and Conrad Hartmann, the name is short for ''Gebrüder-Hartmann'' (Hartmann brothers).<ref>Historical data was mainly taken from Werner Rüttinger's [http://www.ruettinger-web.de/geha-startseite.html site] dedicated to [[Geha]] fountain pen production.</ref> The company was founded specializing in the production of material for stationery, especially paper, blocks, carbonless papers and tapes, becoming in the 20s one of the market leaders in stationery postal sales.
''Geha'' entered the fountain pen market in [[1950]], with the production of economic pens made for the student market called [[Regent]], featuring a band with the company logo. The distinguishing feature of the ''Geha'' pens was the use of a [[piston filler]] equipped with a special ink reservoir (see patents {{Cite patent|GB|666830}} and {{Cite patent|DE|958812}}) that allowed an emergency reserve to be maintained, usable by pushing a pin located under the feeder.
''Geha'' entered the fountain pen market in [[1950]], with the production of economic pens made for the student market. The '50s pens were [[piston filler]] equipped with a special ink tank that allowed to maintain an emergency reserve. Later models passed to [[cartridge filler]], while maintaining the ink reservoir through the use of two separate cartridges, as for the [[Aurora]] [[Duo-Cart]]. In the '60s were produced [[inlaid nib]] models similar to those of [[Sheaffer]].
Nel [[1957]] la produzione venne riorganizzata, venne tolta la veretta con il logo, passando ad un semplice anello sul bordo cappuccio, ed introducendo una classificazione di fascia di prezzo in base al numero di anelli posti sopra il cappuccio. Le penne erano comunque identificate, come per le precedenti [[Regent]] da un codice numerico di tre cifre, e per lo più denominate [[Geha-Schulfüller]].
Nel [[1957]] la produzione venne riorganizzata, venne tolta la veretta con il logo, passando ad un semplice anello sul bordo cappuccio, ed introducendo una classificazione di fascia di prezzo in base al numero di anelli posti sopra il cappuccio. Le penne erano comunque identificate, come per le precedenti [[Regent]] da un codice numerico di tre cifre, e per lo più denominate [[Geha-Schulfüller]].