Filings by year

E01B 27/16: granted patents and published applications per publication year
YearGranted patentsPublished applications
197690
197760
1978190
197960
198060
198160
198290
198370
1984160
198590
1986130
198750
198850
198950
1990130
199180
199260
199330
199460
199530
199660
199740
199840
199920
200030
200136
200271
200334
200435
200552
200614
200704
200821
200910
201022
201112
201233
201342
201404
201517
201645
2017716
20181215
20191013
20201115
20211113
202259
20231515
2024710
2025129
2026112

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