Filings by year

G09B 9/20: granted patents and published applications per publication year
YearGranted patentsPublished applications
198010
198100
198210
198300
198400
198500
198610
198700
198800
198900
199000
199100
199200
199310
199400
199520
199600
199710
199800
199920
200000
200100
200202
200321
200400
200510
200600
200700
200800
200901
201000
201111
201200
201300
201400
201500
201625
201721
201803
201903
202012
202105
202277
2023109
202453
202573
202612

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