Filings by year

F04C 18/04: granted patents and published applications per publication year
YearGranted patentsPublished applications
198510
198600
198700
198800
198900
199000
199100
199200
199300
199400
199520
199600
199700
199800
199900
200010
200162
200221
200300
200421
200500
2006114
200716
200873
200965
201037
201120
201240
201343
201405
201533
201640
201720
201801
201912
202010
202123
202223
202310
202420

By publication year. Applications have been published since 2001.

Subgroups

Granted patents

Recent patents

Most cited

By later US patents