ALEXANDRIA, Virginia, Sept. 26 -- TETHIS, INC., Raleigh, North Carolina has been assigned a patent (No. US 11766366 B2, initially filed Oct. 2, 2020) developed by five inventors Ryan Nicholas Chan, Raleigh, North Carolina; Gordon Sidney Cox, Durham, North Carolina; Vladimiro Nettel, Kirkland, Canada; James Clayton Robinson, Weddington, North Carolina; and Robin Weitkamp, Raleigh, North Carolina, for "Absorbent hygienic articles with sensors and biocompostable elements." . . .