IP Library › Granted Patent US 4,944,233
Granted Patent Utility
US 4,944,233 · App. 07/364,872

Hatch arrangement for covered hopper cars

Inventors: Richard H. Dugge, John W. Coulborn
Patented Case View Patent ↗
Granted: Jul 31, 1990 Filed: Jun 12, 1989
Inventors
Richard H. Dugge
John W. Coulborn
Assignee (at issue)
ACF Industries Incorporated

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Quick Facts
Patent No.
US 4,944,233
App. No.
07/364,872
Filed
1989-06-12
Granted
1990-07-31
Kind
A