Shenzhen Kinghelm Electronics Co., Ltd. In 2018, Shenzhen Kinghelm Electronics Co., Ltd. was granted an invention patent for its Beidou-Based Intelligent Container Electronic Lock. By integrating ...

Students work in groups to select an electronic invention and research who and what was involved in its development. Then they create a display that summarizes the main events surrounding the ...

Digital version of the 2d ed., rev. and expanded. First published in 1968 under title: The invention of the sewing machine. Digital imaging information: Original images captured at 400 dpi in ...