Filings by year

F04C 18/0253: granted patents and published applications per publication year
YearGranted patentsPublished applications
198720
198810
198920
199000
199130
199270
199340
199420
199550
199660
199760
1998120
199940
200090
200181
2002116
200378
200485
200538
200647
200734
200867
200928
2010424
2011822
20121118
20131732
20141230
20153628
20162438
20172528
20183643
20192729
20203543
20214428
20224441
20233853
20246430
20253024
20261135

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

Subgroups

Granted patents

Recent patents

Most cited

By later US patents