Name: J. M. Steel Plant
Other Names: J. M. Steel Mill
Classification:
supporting characters
group
Publisher(s): 
First Appearance: Police Comics #9 (May 1942): "Unknown to anyone, Senator Knight's beautiful daughter..."
Creators: Arthur Peddy
Number of Appearances: 1
Enemy of: Japanese
Defended or Helped by: Phantom Lady
Type of Organization/Group: company
Nation: USA
Note: Japanese plotted to destroy this plant
Police Comics #9 (May 1942): "Unknown to anyone, Senator Knight's beautiful daughter..." (mentioned)
Suggested links for further research about this character:
- https://www.comics.org/issue/2139/