US Patent Issued to SHIMADZU on July 21 for "Mass spectrometer" (Japanese Inventor)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,017, issued on July 21, was assigned to SHIMADZU Corp. (Kyoto, Japan).

"Mass spectrometer" was invented by Shiro Mizutani (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mass spectrometer includes a mass filter, a wave-detection unit, a cancellation circuit and a power supply device. The mass filter selects ions having a mass-to-charge ratio corresponding to an applied AC voltage. The wave-detection unit has a plurality of rectifiers each of which includes a rectifying device and which are connected in parallel, and detects the AC voltage applied to the mass filter as a wave-detection voltage. The cancellation circuit cancels an offse...