Filings by year

G09B 23/182: granted patents and published applications per publication year
YearGranted patentsPublished applications
197720
197800
197900
198000
198100
198200
198300
198400
198500
198600
198700
198800
198900
199000
199100
199200
199300
199400
199510
199600
199700
199800
199900
200010
200100
200200
200314
200403
200520
200620
200710
200801
200910
201000
201100
201200
201300
201402
201511
201610
201700
201800
201900
202000
202101
202211
202311

By publication year. Applications have been published since 2001.

Recent patents

Most cited

By later US patents