2020

82. Conductive paste composition and method for preparing thereof, Kor. Patent Application No. 10-2020-0155208 (2020)

81. Method of manufacturing metal mold using the 3D printing, Kor. Patent Application No. 10-2020-0069262 (2020).

80. Lead-free piezoelectric ceramic composition and preparation method thereof, Kor. Patent Application No. 10-2020-0076707 (2020).

2018

79. Silver - ceramic composites for silver art clay and producing methodof same, Kor. Patent Application No. 10-2018-0050657 (2018).

78. Lead-free piezoelectric composition and manufacturing the same, Kor.Patent Application No. 10-2018-0033519 (2018).

77. Lead-free piezoelectric composition and manufacturing the same, Kor.Patent Application No. 10-2018-0033309 (2018).

76. Lead-free piezoelectric ceramic composition, and preparation methodthereof, Kor. Patent Application No. 10-2018-0039640 (2018).

2017

75. Lead-free piezoelectric ceramic composition with excellent electricfield-induced strain property and preparation method of the same, Kor. PatentApplication No. 10-2017-0104926 (2017).

75. Lead-free piezoelectric ceramic ternary compositions with highstrains, Kor. Patent Application No. 10-2017-0064310 (2017).

2016

74. Production method of lead-free piezoelectric ceramics with highstrains, Kor. Patent Application No. 10-2016-0082892 (2016).

73. Silver - ceramic composition for silver art clay and producing methodof same, Kor. Patent Application No. 10-2016-0085732. (2016)

72. Lead-free piezoelectric ceramic compositions, Kor. Pat. 10-1681386(2016. 11. 24)

71. Lead-free piezoelectric ceramic compositions, Kor. Pat. 10-1671672(2016. 10. 26)

70. Lead-free piezoelectric ceramic compositions, Kor. Pat. 10-1590703(2016. 01. 26)

2013

69. Lead-free piezoelectric ceramic multilayer actuator, Kor. Pat.10-1347451 (2013.12. 26)

68. Lead-freepiezoelectric ceramic compositions with high strains, Kor. Pat. 10-1318088 (2013.10.07).

67. Variable oil pump embedded in oil chamber, Kor. Pat. 10-1333959 (2013. 11. 21).

66. Variableoil pump using linear electromagnetic actuator, Kor. Pat. 10-1334005 (2013. 11. 21).

65. Variableoil pump for automobiles, Kor. Pat.10-1284445 (2013. 07. 03).

64. Lead-freepiezoelectric ceramics with thermally stable strains, Kor. Pat. 10-1306419(2013. 09. 03).

63. Lead-freepiezoelectric ceramic composition, Kor. Pat. 10-1306472 (2013. 09. 03).

62. Lead-free electrostrictive ceramics with high mechanical qualityfactor, Kor. Pat. 10-13100450 (2013. 09. 12).

2011

61. Smart seatsystem, Kor. Pat. 10-1070073 (2011.09.27)

2010

60. Composition of lead-free piezoelectric ceramics for Ultrasonicsensor, KR Pat. 2010-0012199 (2010.02.08)

2009

59. Ion generator with self-cleaning, Kor. Pat. Publication No. 2009-0080151 (2009.07.24)

58. Method and apparatus for manufacturing ultrafine lead-free solderpowder for lead-free solder paste, Kor. Pat. Publication No. 2009-0084559 (2009.08.05)

57. Sensor for determining viscosity, Kor. Pat. No. 0908206 (2009.07.20)

56. Method of manufacturing TE mode dielectric filter, Kor. Pat. No. 0906215 (2009.06.29)

55. Anticorrosion pigments for automotive undercoating, Kor. Pat.Publication No. 2009-0074357 (2009.07.07)

54. Nano composite anticorrosion paints for ship-bottom, Kor. Pat.Publication No. 2009-0011739 (2009.02.02)

2008

53. TE Modedielectric duplexer, Kor. Pat. 0866978,2008

52. Dielectricduplexer, Kor. Pat. 0852487, 2008

51. System forpurifying indoor atmosphere, Kor. Pat. 0824431,2008

50.Nondestructive inspection device for detecting defect of multilayer piezo-actuator,Kor. Pat. 0809638, 2008

49.Nondestructive inspection device for detecting defect of multilayerpiezo-actuator, Kor. Pat. 0801281,2008

2007

48. Device forprotecting surge and method for manufacturing thereof, Kor. Pat. 0792205, 2007

47.Sterilization and seizure system of vehicle, Kor. Pat. 0759068, 2007

46. FabricationMethod Of Gas Filled Surge Absorbers, Kor. Pat. 0728635, 2007

2006

45. Fabricationmethod of gas filled surge absorbers, Kor. Pat. 0650335, 2006

44. SurgeAbsorber, Kor. Pat. 0604250, 2006

43. The methodand Apparatus for sterilizing and deodorizing and cleaning by generating ozoneand anion, Kor. Pat. 0584505, 2006

42. Low firingceramic composition for microwave components and manufacture method therefor,Kor. Pat. 0569112, 2006

41. Air sterilizerusing ozone, Kor. Pat. 0560054, 2006

40.Piezoelectric ceramic composite for multilayered piezoelectric actuators, Kor.Pat. 0559771, 2006

39.Manufacturing method for surge absorber, Kor. Pat. 0550497, 2006

2005

38. Fabricationmethod of ceramic dielectric duplexers, Kor. Pat. 0522726, 2005

37. Ozonegenerator, Kor. Pat. 0502784, 2005

36. Ozonegenerator, Kor. Pat. 0502783, 2005

35. Microwavedielectric ceramic composition, Kor. Pat. 0487070,2005

34.Piezoelectric ceramic composition for ceramic actuators and method offabricating the piezoelectric ceramics, Kor. Pat. 0481226, 2005

2004

33. Ozonedevelopment apparatus, Kor. Pat. 0415789,2004

32. OzoneGenerator, US Pat. 6730227, 2004

2003

31.Manufacturing method of a piezoelectric transformer capable of improvingboosting characteristics, Kor. Pat. 0371656,2003

30. Ozonegenerator, Kor. Pat. 0369448, 2003

2002

29.Pyroelectric device for thermal imaging system and its manufacturing method,Kor. Pat. 0349237, 2002

28.Energy-trapped type piezoelectric ceramic resonator, Kor. Pat. 0330500, 2002

27. Asmall-sized efficient ozone generator, Kor. Pat. 0327598, 2002

2001

26. Ceramiccompaction equipment and method for compacting ceramic using thereof, Kor. Pat.0313339, 2001

25. Infraredsensing apparatus and method for fabricating the same, Kor. Pat. 0305671, 2001

24. Ozonegenerator, Kor. Pat. 0290521, 2001

1998

23.Piezoelectric ceramic composition for high frequency, Kor. Pat. 0180486, 1998

22.Characteristic measuring apparatus of piezoelectric resonator, Kor. Pat. 0173192, 1998

1996

21. Device andmethod for grinding cylindrical surfaces externally, Kor. Pat. 0005295, 1996

20. Device andmethod for grinding cylindrical surfaces externally by using multi-clamp, Kor.Pat. 0005294, 1996

19. Electricceramic composition, Kor. Pat. 0004394,1996

1995

18. Process andprocessing method of ceramic material having fine hole, Kor. Pat. 0009288, 1995

1994

17. Workingdevice, Kor. Pat. 0010329, 1994

16. Ceramicdielectric composite with high permittivity, Kor. Pat. 0008654, 1994

15. Productionmethod for ceramic tube have minute hole, Kor. Pat. 0007522, 1994

14. Highelectrics of ceramic composition, Kor. Pat. 0007225,1994

13. Highelectrics of ceramic composition, Kor. Pat. 0006425,1994

12. Ceramiccapacitor, Kor. Pat. 0003971, 1994

11. Ceramiccapacitor, Kor. Pat. 0003970, 1994

1993

10.Manufacturing method of heat-proof metal-nitride film for semiconductor device,Kor. Pat. 0000228, 1993

1992

9. Manufactureof gallium arsenide semiconductor element, Kor. Pat. 0007357, 1992

8. X-raygeneration system for an ultra fine lithography and a method therefor, Kor.Pat. 0004961, 1992

7. Checkingmethod for impurity degree of semiconductor device, Kor. Pat. 0003827, 1992

6. Method offield effect transistor, Kor. Pat. 0002517,1992

1991

5. X-raylithography carbon mask and method of manufacturing the same, Kor. Pat. 0006741, 1991

4.Manufacturing method of self align type gas fet using double side space wall,Kor. Pat. 0005399, 1991

3.Manufacturing method of self align type gas fet using double side space Wall,Kor Pat. 0005399, 1991

2. X-raylithography carbon mask and method of manufacturing the same, US Pat. 4998267, 1991

1989

1. X-raylithography carbon mask and method of manufacturing the same, Jp Pat. 63-329524, 1989