BUTLER NATIONAL CORPORATION 10-K 4-30-2012

Company

BUTLER NATIONAL CORP

Filed

July 30, 2012

Period of Report

April 30, 2012

Accession Number

0001140361-12-034252

A 10-K is a company's comprehensive annual report, required by the SEC. It includes audited financial statements, a description of the business, risk factors, and management's discussion of results. Learn more about 10-K filings →