IP Library › Granted Patent US 4,998,598
Granted Patent Utility
US 4,998,598 · App. 07/357,801

Acoustical door

Inventors: James K. W. Mardian, Curtis I. Holmer
Patented Case View Patent ↗
Granted: Mar 12, 1991 Filed: May 30, 1989
Inventors
James K. W. Mardian
Curtis I. Holmer
Assignee (at issue)
The Ceco Corporation

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Quick Facts
Patent No.
US 4,998,598
App. No.
07/357,801
Filed
1989-05-30
Granted
1991-03-12
Kind
A