Dropped ceiling
History

Dropped ceiling

Section Title: History
Table Section Text: None

U. S. Dropped Ceiling Patents to September 8, 1958

Date Filed	Patent No.	Applicant	Title	Comments

05/28/1919	1,470,728	Hall	Suspended Ceiling

09/03/1931	1,931,574	Danielson	Suspended Ceiling Hanger

10/24/1950	2,710,679	Bibb, Remmen, Bibb	Suspended Ceiling Construction	First fully developed grid system concept

12/13/1955	2,816,623	Wong	Modular Ceiling	First integration of tiles and grid. Wong founded Cepco Manufacturing, a company now absorbed into Ceilume, a division of Empire West, Inc.

05/11/1956	2,896,752	Wilde	Suspended Ceiling Grid Construction

07/31/1956	2,894,291	Sorenson	Suspended Ceiling System

10/25/1956	2,895,180	Byssing	Suspended Ceiling

02/07/1958	2,963,251	Fuss	Supporting Electric Lighting Fixture from Suspended Ceiling Framework

09/08/1958	2,984,946	Brown	Accessible Suspended Ceiling

Sentence(s)

U. S. Patent No. 1,470,728 for dropped ceilings was applied by Hall on May 28, 1919.

final_sentence: U. S. Patent No. 1,470,728 for dropped ceilings was applied by Hall on May 28, 1919.