The name is nominally a registered trademark of based in Suita, Osaka which is still the major market-share holder, but the enforceability of the tradename has been voided by the Supreme Court of Japan, which ruled seirogan to be a common generic name. The ruling only recognizes proprietary use of the bugle logo by Taiko,, pp. 131-; discusses bugle as only recognized trademark; mentions a site that collected 26 different similar looking seirogan brand boxes; on p. 134 is a gallery of 20 different such boxes. but not protection of its characteristic packaging. As a result, dozens of extremely similar packaged drugs are being manufactured and sold in the market.
