Filings by year

F04B 37/04: granted patents and published applications per publication year
YearGranted patentsPublished applications
197810
197900
198000
198100
198200
198300
198400
198500
198610
198710
198800
198910
199000
199100
199220
199300
199420
199500
199600
199700
199800
199900
200020
200100
200200
200311
200400
200511
200601
200701
200810
200900
201010
201101
201200
201305
201403
201500
201630
201732
201815
201913
202034
202151
202213
202320
202402
202503
202622

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

Recent patents

Most cited

By later US patents