ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,393,819, issued on Aug. 19, was assigned to FEDERAL CARD SERVICES LLC (Cincinnati).
"RFID enabled metal transaction cards" was invented by David Finn (Weissensee, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A transaction card (smartcard) having a front "continuous" (with no slit) metal layer (ML, FML, 930, 1130) with an opening (912, 1112) for a dual-interface transponder chip module (TCM, 910, 1110) having a module antenna (MA, 911, 1111) on its bond side (not shown). A magnetic shielding layer (MSL, 942, 1142) comprising ferrite material disposed below the front face continuous metal layer. An amplifying element, booster antenna circuit (BA...