ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,909, issued on May 6, was assigned to FREAK Co. LTD. (Sakai, Japan).

"Nailing machine" was invented by Makoto Hirooka (Sakai, Japan) and Hiroshi Fujii (Sakai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric nailing machine capable of continuous driving is provided.A driving unit 10 which drives a nail N supplied to a driving position a includes a cylinder unit 11 having a cylinder 12 and a piston 13, a driving rod 14 which is consecutively provided on the piston 13 and slidably penetrates a cylinder cap 12b, a driving spring 15 which biases the piston 13 in a driving direction, and a moving unit 16 which moves the piston 13 in a cou...