ALEXANDRIA, Va., July 7 -- United States Patent no. 12,672,961, issued on July 7, was assigned to BIOTRONIK AG (Buelach, Switzerland).

"Venous valve prosthesis" was invented by Michael Stiehm (Rostock, Germany), Wolfram Schmidt (Rostock, Germany), Niels Grabow (Rostock, Germany), Jonas Keiler (Rostock, Germany), Maria Reumann (Rostock, Germany), Andreas Wree (Elmenhorst, Germany), Andreas Hof (Luebeck, Germany), Heinz Mueller (Rostock, Germany), Carsten Momma (Rostock, Germany), Klaus-Peter Schmitz (Rostock, Germany), Karsten Koop (Rostock, Germany), Julia Schubert (Rostock, Germany), Kerstin Lebahn (Rostock, Germany), Sabine Illner (Rostock, Germany), Sabine Kischkel (Rostock, Germany) and Jonathan Ortelt (Rostock, Germany).

According to...