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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). 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). 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.

La [[Geha]] entrò nel mercato delle penne stilografiche nel [[1950]], con la produzione di penne economiche rivolte al mercato studentesco. Le penne degli anni '50 erano dotate di [[caricamento a stantuffo]], ed equipaggiate con uno speciale serbatoio di inchiostro che consentiva di mantenere una riserva di emergenza. In seguito i modelli passarono al [[caricamento a cartuccia]], mantenendo la riserva di inchiostro grazie all'uso di due cartucce separate, come per la [[Duocart]] dell'[[Aurora]]. Negli anni '60 vennero prodotti modelli con [[inlaid nib|pennino intarsiato]] simili a quelli della [[Sheaffer]].

[[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]] [[Duocart]]. In the '60s were produced [[inlaid nib]] models similar to those of [[Sheaffer]].

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