*The BLM Eastern States Office has an index to all patents issued after 30 June 1908.
::Eastern States Office<br>20 M St SE<br>Washington, DC 20003<br>Telephone: 202-912-7700<br>Internet: [https://www.blm.gov/
es/st/en.html BLM - Eastern States]
*The Family History Library and the Eastern States Office have an incomplete card file that indexes pre-1908 patents issued in Alabama, Arkansas, Florida, Illinois, Indiana, Iowa, Louisiana, Michigan, Minnesota, Missouri, Mississippi, Ohio, and Wisconsin. These are on 160 microfilms.