ALEXANDRIA, Va., May 5 -- United States Patent no. 12,616,193, issued on May 5, was assigned to SPERMATECH AS (Oslo, Norway).

"5-(1H-indol-3-yl)-oxazole, -oxadiazole and -furan derivatives as enhancers of sperm motility" was invented by Ken Roger Rosendal (Oslo, Norway), Tuva Holt Hereng (Oslo, Norway), Steffi Lundvall (Oslo, Norway), Espen Marcelius Gjems (Oslo, Norway), Havard Hildeng Hauge (Oslo, Norway) and Bjorn Steen Skalhegg (Oslo, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to the use of compounds of formula (I), stereoisomers, and physiologicaily tolerable salts thereof, to enhance the motility of sperm obtained from a non-human mammal: wherein in formula I: X is -NR'...