Filings by year

E01C 23/227: granted patents and published applications per publication year
YearGranted patentsPublished applications
197610
197700
197830
197900
198000
198110
198200
198310
198400
198510
198610
198710
198800
198900
199040
199100
199210
199300
199420
199510
199600
199700
199820
199900
200020
200110
200211
200300
200400
200500
200601
200721
200811
200901
201018
201103
201211
201361
201420
201511
201610
201723
201821
201920
202001
202120
202210
202301
202411
202512
202621

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

Recent patents

Most cited

By later US patents