ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,156, issued on March 11.
"Needle assembly for liquid applicator" was invented by Long Xiao (North York, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A needle assembly for a liquid applicator comprises a housing, a needle bundle, and an elastic tubular member. The housing comprises a longitudinal channel having upper and lower open ends. The needle bundle is movably mounted in the channel and configured to be driven by a driving shaft to reciprocatively move between a retracted position and an extended position. The elastic tubular member comprises a first end attached to the housing and a second end attached the needle bundle to bias the n...