TOKYO -- Japan remains a powerhouse of battery innovation, with Panasonic, Toyota Motor and other names applying for more than one-third of international patents in this field, a new report shows.
Panasonic and Toyota fuel growth as Samsung and LG put South Korea in second place

Panasonic, a battery partner to U.S. electric-car builder Tesla, ranked second in international patent filings for batteries for 2000 to 2018. (Photo by Kentaro Iwamoto)
TOKYO -- Japan remains a powerhouse of battery innovation, with Panasonic, Toyota Motor and other names applying for more than one-third of international patents in this field, a new report shows.