E04H 3/22

Theatres

Official title: Theatres; Concert halls; Studios for broadcasting, cinematography, television or similar purposes

E04H3/22 (Theatres) appears on 416 US grants and 382 published applications in this corpus.

Search patents in E04H
Granted patents
416
Published applications
382
Assignees
190
Inventors
642
Latest grant
8 Sep 2026

Filings by year

E04H 3/22: granted patents and published applications per publication year
YearGranted patentsPublished applications
197620
197750
197820
197910
198010
198110
198210
198310
198420
198500
198650
198750
198850
198960
1990110
199160
199250
199330
1994120
199550
199620
1997110
1998110
199980
2000110
200151
200225
200336
200426
200535
200626
200739
200836
200989
201047
2011715
2012815
20131314
20141131
20152124
20162730
20172929
20181625
20192823
20201832
20213123
20221318
20231312
20241116
2025810
202655

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.

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