In 1965 Richard Isbell akasika Americana Typeface nokuda American Type Founders uye zvaisanganisira interrobang somumwe vatambi. muna 1968, mumwe interrobang kiyi aiwanika vamwe Remington typewriters. muna 1970s, yokutsiva interrobang keycaps uye typefaces aiwanika vamwe Smith-Corona typewriters. mubvunzo: Chii chinokosha chinogona kuwanikwa vamwe Remington typewriters kugadzirwa muna 1968?
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