ALEXANDRIA, Va., June 12 -- United States Patent no. RE50,428, issued on May 13, was assigned to DENSO WAVE Inc. (Aichi-Pref., Japan).
"Input module of industrial control apparatus" was invented by Takaaki Maekawa (Chita-gun, Japan) and Takashi Hanai (Toyokawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An input module of an industrial control apparatus receives a digital signal from an external source, outputs a binary signal as an internal signal, and determines a level of the digital signal based on the internal signal. The input module determines that the digital signal has a low level when a low level of the internal signal continues for a certain time period, determines that the digital signa...