Where it comes from
“Half-bent” is factory English for a shank that turns part way home — not a nose-warmer, not a full Oom-Paul curve. Houses used it on apples, billiards and brandies alike. The idea is comfort without the compact look of a full bent. There is no single inventor. It is a degree of bend, written on the shape name so a buyer could order from a list.
The specification
392/24 is the half-bent apple on this site, and it has a card: 140 mm long, 47 g, chamber 20 × 42 mm, bowl 49 mm high, 42 mm outside. Art rusticated, colored acrylic stem. The chamber is deeper than 423/24’s straight apple (42 mm against 35 mm). The bowl is a little taller. That is the measured difference, not a catalogue average.
How it smokes in the hand
The moderate bend takes weight off the teeth compared with 423/24 and leaves more length than 356/23’s fuller curve. If you like a round bowl and want a quiet bit without a full hang, this is the Asikyan plate to look at first.