Assignee
OZEN CORP
JP·43 granted patents·241 citations·filing 1979–1992
Top patents by PatentIndex Score
43 records- 0173US4648086ASimplified sound reproducing device capable of reproducing a plurality of recorded itemsOZEN CORP·Filed 1985·Granted Mar 3, 1987·20 cites·5 claims
- 0260US4801880ADevice for measuring the speed of a moving objectOZEN CORP·Filed 1987·Granted Jan 31, 1989·29 cites·4 claims
- 0357US4433404AVariety playing sound reproducing deviceOZEN CORP·Filed 1981·Granted Feb 21, 1984·9 cites·6 claims
- 0456US4827465ASimplified sound reproducing device having a means for preventing collision between a reproducing stylus and a record discOZEN CORP·Filed 1987·Granted May 2, 1989·10 cites·3 claims
- 0554US4524437ASimplified sound-reproducing device having an external output shaftOZEN CORP·Filed 1983·Granted Jun 18, 1985·8 cites·6 claims
- 0650US4574370ASound reproduction selection apparatus for a simplified sound reproducing deviceOZEN CORP·Filed 1985·Granted Mar 4, 1986·8 cites·5 claims
- 0748US4404668ASound reproducing deviceOZEN CORP·Filed 1981·Granted Sep 13, 1983·6 cites·4 claims
- 0848US4373199AApparatus for electromagnetically imparting stylus force for sound reproducing device comprising an inhibit circuit for shock noise of reproducing stylusOZEN CORP·Filed 1981·Granted Feb 8, 1983·6 cites·5 claims
- 0947US4404667ASound reproducing device driven by a constant torque pull string type spring and started by selective starter rods for playing multiple record groovesOZEN CORP·Filed 1982·Granted Sep 13, 1983·6 cites·3 claims
- 1045US4876678ASound reproducing device for playing a record disc having a plurality of recorded groovesOZEN CORP·Filed 1989·Granted Oct 24, 1989·6 cites·4 claims
- 1145US4757491ASound generating toyOZEN CORP·Filed 1986·Granted Jul 12, 1988·12 cites·1 claims
- 1245US4482990ASimplified sound-reproducing device for a record disc having a plurality of recorded groovesOZEN CORP·Filed 1983·Granted Nov 13, 1984·5 cites·3 claims
- 1342US5054012ASound reproducing device for playing a record disc having a plurality of recorded groovesOZEN CORP·Filed 1989·Granted Oct 1, 1991·5 cites·4 claims
- 1442US4723291AVoice generating deviceOZEN CORP·Filed 1984·Granted Feb 2, 1988·7 cites·3 claims
- 1542US4701681AStarting device for a toy motor using an ultrasonic wave signalOZEN CORP·Filed 1986·Granted Oct 20, 1987·10 cites·2 claims
- 1641US4823332ASimplified sound reproducing device capable of reproducing a plurality of record discsOZEN CORP·Filed 1987·Granted Apr 18, 1989·5 cites·6 claims
- 1741US4694445ARecord disc replacing means for a selective playing type sound reproducing deviceOZEN CORP·Filed 1986·Granted Sep 15, 1987·5 cites·3 claims
- 1841US4670868ASimplified sound reproducing device having a plurality of external shaft corresponding to the recorded itemsOZEN CORP·Filed 1986·Granted Jun 2, 1987·5 cites·6 claims
- 1941US4622658ASimplified sound reproducing device having switchable circuitsOZEN CORP·Filed 1983·Granted Nov 11, 1986·4 cites·2 claims
- 2041US4541085ASimple acoustic playback device for a record having plurality of recording groovesOZEN CORP·Filed 1984·Granted Sep 10, 1985·4 cites·1 claims
- 2141US4447898ASimplified sound reproducing device driven by a spring motorOZEN CORP·Filed 1982·Granted May 8, 1984·4 cites·6 claims
- 2241US4349747ASound response time switch for flowing current for a predetermined period of timeOZEN CORP·Filed 1981·Granted Sep 14, 1982·6 cites·10 claims
- 2340US5138602ASound record playing apparatus having shock responsive weight member to actuate the sameOZEN CORP·Filed 1991·Granted Aug 11, 1992·6 cites·9 claims
- 2439US5247511ACompact sound record playing apparatusOZEN CORP·Filed 1992·Granted Sep 21, 1993·5 cites·5 claims
- 2538US5195919APanel piece combination toyOZEN CORP·Filed 1991·Granted Mar 23, 1993·10 cites·4 claims
- 2638US4694446ASimplified sound reproducing device of random selecting typeOZEN CORP·Filed 1986·Granted Sep 15, 1987·4 cites·11 claims
- 2738US4670867ASimplified sound reproducing device having a plurality of external shaft corresponding to the recorded itemsOZEN CORP·Filed 1986·Granted Jun 2, 1987·4 cites·7 claims
- 2837US5177733ASound recording playing apparatus with improved vibration plateOZEN CORP·Filed 1991·Granted Jan 5, 1993·4 cites·2 claims
- 2935US4705994AElectric equipment driving circuitOZEN CORP·Filed 1986·Granted Nov 10, 1987·6 cites·1 claims
- 3035USD278334SElectric motor driven phonograph for internal placement in toys or the likeOZEN CORP·Filed 1981·Granted Apr 9, 1985·1 cites·1 claims
- 3135US4486871AContinuous repeating type simplified sound reproducing deviceOZEN CORP·Filed 1984·Granted Dec 4, 1984·2 cites·5 claims
- 3233US4694444ARecord disc replacing meansOZEN CORP·Filed 1986·Granted Sep 15, 1987·2 cites·3 claims
- 3333US4547873ASimplified sound reproducing deviceOZEN CORP·Filed 1984·Granted Oct 15, 1985·1 cites·3 claims
- 3432US5164927ACompact record player having downwardly extending notched rib and multiple selection leversOZEN CORP·Filed 1991·Granted Nov 17, 1992·4 cites·1 claims
- 3532US4408310ASimplified sound reproducing device driven by a spring motorOZEN CORP·Filed 1981·Granted Oct 4, 1983·1 cites·4 claims
- 3631US4800305APull string mechanism in a pull string type sound reproducing deviceOZEN CORP·Filed 1988·Granted Jan 24, 1989·1 cites·2 claims
- 3731USD277276SSpring driven phonograph for internal placement in toys or the likeOZEN CORP·Filed 1981·Granted Jan 22, 1985·0 cites·1 claims
- 3830US4862444AIndex carrier for indexing and reproducing a plurality of record discs and a simplified sound reproducing device incorporating thereofOZEN CORP·Filed 1987·Granted Aug 29, 1989·0 cites·6 claims
- 3930US4573150ASelf-holding switch for use in a sound reproducing deviceOZEN CORP·Filed 1984·Granted Feb 25, 1986·0 cites·2 claims
- 4030US4234193ASimplified phonograph capable of selecting desired grooves on a record discOZEN CORP·Filed 1979·Granted Nov 18, 1980·2 cites·7 claims
- 4128US4811322APhonograph for a record disk having a plurality of sound groovesOZEN CORP·Filed 1988·Granted Mar 7, 1989·2 cites·2 claims
- 4228US4498160ASimplified record player capable of automatically housing reproducing stylus upon removal of record disc from the record playerOZEN CORP·Filed 1982·Granted Feb 5, 1985·5 cites·4 claims
- 4326US5103442ASimplified acoustic playback apparatusOZEN CORP·Filed 1989·Granted Apr 7, 1992·1 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →