US 12,249,847 B2
Wireless power transfer
Zohaib Hameed, Woodbury, MN (US); Jaewon Kim, Woodbury, MN (US); and Sithya S. Khieu, Eden Prairie, MN (US)
Assigned to 3M Innovative Properties Company, St. Paul, MN (US)
Appl. No. 17/309,781
Filed by 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US)
PCT Filed Dec. 13, 2019, PCT No. PCT/IB2019/060768
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/141378, PCT Pub. Date Jul. 9, 2020.
Claims priority of provisional application 62/787,005, filed on Dec. 31, 2018.
Prior Publication US 2022/0052559 A1, Feb. 17, 2022
Int. Cl. H02J 50/23 (2016.01); H02J 50/00 (2016.01); H02J 50/12 (2016.01)
CPC H02J 50/23 (2016.02) [H02J 50/005 (2020.01); H02J 50/12 (2016.02); H02J 2310/22 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A system comprising:
a planar surface;
at least one antenna comprising one or more conductive loops configured to produce an electromagnetic field disposed within the planar surface, wherein each of the one or more conductive loops comprises a copper wire that, in combination with a substrate, forms a thin-film, and wherein the antenna has an outer diameter of 4.8 centimeters; and
at least one flat article movably disposed on top of the planar surface, wherein the flat article comprises at least one resonating capacitor loop, and wherein the flat article is configured to concentrate the electromagnetic field into an area defined by the flat article.