The challenge was to create a single typeface weight that was versatile enough without a large font family, and could be put to use with a variety of media formats, from book text to advertising spreads, all while remaining legible and delightful to read. Originally designed between the years 2002 and 2004, the inspiration for the design originated from the concepts of Stefano Giovannoni's uber-contemporary industrial designs and architecture. Where to start with such a font design was obvious to Diphthong Regular's designer, Max Hancock; to create a transitional, slab serif form that was corky and serious, interchangeably. The characteristics of the font followed a postmodern playfulness, popular in many sub-cultures looking for an alternative to the harsher, cut-shape, deconstructivist styles. And, the unique objective behind the design was to make it so that the usual difficult combination of the t and h (hth) in language was legible as well as pleasant to look at, thus the reason for the name. The soft, subtle roundings add a flair of utilitarianism while the cut edge ascenders help to blur the line between cute and diametrical mannerisms.

From the March 2008 issue of In Your Face: "(Morning Sans) is an especially legible stressed sans (that) manages to combine both a calligraphic fluidity with the hard edges of incised lettering without focusing too much attention on individual characters: it remains very readable and keeps an even color on the page, even in long settings."

Fox Sans Pro – an upgraded version of Fox Sans TRF (2008), with careful refinements to glyph shapes and extension of glyph amounts, which enabled support of more Latin languages as well as support of Cyrillic. Four more styles have been added to the original six styles. This typeface is released in OpenType format with some OpenType features.

Egon Condensed is a geometric sans serif typeface family built in nine styles - light, regular, bold weights in roman and italic respectably, plus three alternatives in roman. Egon Sans Condensed is an extension of Egon family - Egon Slab Serif (2008) and Egon Sans Serif (2010). Egon Sans is released as OpenType single master with a Western CP1252 character set.

ATC Arquette, is a best-selling geometric sans-serif font created with minimal ornamentation to adhere with accessibility and visibility guidelines, and be as visually legible as possible. Contains 400+ glyphs, full alphabet, ligatures, numberals, accents and punctuation. ATC Arquette was released in 2018.

Bistro and Hot Sauce have been prepared quickly. In Bistro you will find 10 fine traces from coffee cups, and in HotSauce 10 pleasant-for-eyes stains from sauce. Both fonts are created in the 1998. OpenType revision, with extended Latin characters, made in 2009.

Subway Ticker is based on a 5×7 grid, electronic display observed on a New York subway train in February 2005. Also included is a ‘Grid’ variation of the font that is slightly more spaced out and based upon a more precise grid structure.

Bistro and Hot Sauce have been prepared quickly. In Bistro you will find 10 fine traces from coffee cups, and in HotSauce 10 pleasant-for-eyes stains from sauce. Both fonts are created in the 1998. OpenType revision, with extended Latin characters, made in 2009.