patentgrep
SearchCompaniesTechnologiesAPIPricingDocs
DocsGet an API key
  1. Technology classes
  2. /H · Electricity
  3. /H02 · Generation
  4. /H02M · Apparatus for conversion between ac and ac, between ac and dc, or
  5. /H02M 3/00 · Conversion of dc power input into dc power output
  6. /H02M 3/22 · Conversion of dc power input into dc power output: with intermediate conversion
  7. /H02M 3/24 · By static converters
  8. /H02M 3/28 · Using discharge tubes with control electrode or semiconductor devices with control electrode
  9. /H02M 3/325 · Using devices of a triode or a transistor type requiring continuous application
  10. /H02M 3/33
H02M 3/33

Using discharge tubes only

Official title: using discharge tubes only

H02M3/33 (Using discharge tubes only) appears on 2 US grants and 2 published applications in this corpus.

Search patents in H02M

Where it sits

  1. HElectricity
  2. H02Generation
  3. H02MApparatus for conversion between ac and ac, between ac and dc, or
  4. H02M 3/00Conversion of dc power input into dc power output
  5. H02M 3/22Conversion of dc power input into dc power output: with intermediate conversion
  6. H02M 3/24By static converters
  7. H02M 3/28Using discharge tubes with control electrode or semiconductor devices with control electrode
  8. H02M 3/325Using devices of a triode or a transistor type requiring continuous application
  9. H02M 3/33Using discharge tubes only
Granted patents
2
Published applications
2
Assignees
3
Inventors
9
Latest grant
15 May 2018

Filings by year

Granted patentsPublished applications
H02M 3/33: granted patents and published applications per publication year
YearGranted patentsPublished applications
197610
197700
197800
197900
198000
198100
198200
198300
198400
198500
198600
198700
198800
198900
199000
199100
199200
199300
199400
199500
199600
199700
199800
199900
200000
200100
200200
200300
200400
200500
200600
200700
200800
200900
201000
201100
201200
201300
201400
201500
201600
201701
201811

19761986199620062018

By publication year. Applications have been published since 2001.

Recent patents

  • Gas tube-switched high voltage DC power converter15 May 2018US 9,973,092 B2General Electric Company
  • Method for exciting inductive-resistive loads with high and controllable direct current25 May 1976US 3,959,710 AThe United States of America as represented by the United States Energy Research and Development Administration
  • Voltage compensation circuit, wireless communication device, and voltage compensation method19 Apr 2018US 2018/0109989 A1Fujitsu Limited
  • Gas tube-switched high voltage dc power converter26 Oct 2017US 2017/0310220 A1General Electric Company

Most cited

By later US patents
  • Method for exciting inductive-resistive loads with high and controllable direct current3US 3,959,710 AThe United States of America as represented by the United States Energy Research and Development Administration · 1976
  • Gas tube-switched high voltage DC power converter1US 9,973,092 B2General Electric Company · 2018

Top assignees

Documents
  • GEGeneral Electric Company2
  • Fujitsu Limited1
  • USThe United States of America as represented by the United States Energy Research and Development Administration1

Often classified with

  • Y02BEnergy-efficient buildings2
  • Y02EClean energy generation and storage2
  • H04WWireless communication networks1
  • Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information1

Documents that also carry the other class.

patentgrep

Search every US patent grant since 1976 and every published application since 2001. Updated weekly from USPTO.

Product

  • Search
  • New this week
  • Where the data comes from
  • Pricing

Browse

  • Companies
  • Technology classes

Developers

  • API docs
  • PatentsView-compatible API
  • MCP server
  • Changelog

About

  • Privacy
  • Terms
© 2026 patentgrepData from USPTO bulk files