Filings by year

G04B 47/068: granted patents and published applications per publication year
YearGranted patentsPublished applications
198010
198100
198200
198300
198400
198500
198600
198700
198820
198900
199000
199100
199200
199300
199410
199510
199600
199700
199800
199900
200000
200100
200200
200300
200400
200501
200601
200700
200800
200900
201000
201100
201200
201301
201410
201500
201602
201707
201832
201924
202010
202131
202221
202300
202420

By publication year. Applications have been published since 2001.