Filings by year

H02N 2/004: granted patents and published applications per publication year
YearGranted patentsPublished applications
197710
197800
197900
198000
198100
198200
198300
198400
198500
198600
198700
198800
198900
199000
199140
199230
199310
199410
199530
199610
199760
199870
1999120
200070
200150
200234
200310
2004417
2005718
20061417
20071610
2008719
20091522
20102121
20112215
20121315
20131211
2014912
201587
2016616
2017812
2018810
20191312
2020713
20211111
2022207
2023105
202423
202533
202622

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

Recent patents

Most cited

By later US patents