Inventor

Tetsuji Yamashita

Inventor

Kyoto, JP

Overview

30→

Patents

1990–2021

Patent span

Mechanical engineering

Primary field (CPC F)

Patents· 30 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H02Mprimary

H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems17%

F25BRefrigeration machines, plants or systems16%

Y02BClimate change mitigation technologies related to buildings, e.g. housing, house appliances or related end-user applications16%

G05DSystems for controlling or regulating non-electric variables10%

F25DRefrigerators6%

B24BMachines, devices, or processes for grinding or polishing5%

B24DTools for grinding, buffing or sharpening2%

B41JTypewriters2%

C02FTreatment of water, waste water, sewage, or sludge2%

C09GPolishing compositions2%

PatentTitleYear

11,027,563Printing apparatus and medium conveyance method2021 10,414,021Polishing abrasive particle, production method therefore, polishing method, polishing device, and slurry2019 9,030,849'Switching power supply device and semiconductor device'2015 8,335,097'Semiconductor device that converts input direct current voltage to regulated output voltage by intermittently switching on and off the input direct current voltage'2012 8,274,802'Energy transmission device and semiconductor device for energy transmission control'2012 7,782,638'Switching power supply device, semiconductor device, and control method'2010 7,778,050'Energy transfer device and energy transfer control semiconductor device'2010 7,759,696'High-breakdown voltage semiconductor switching device and switched mode power supply apparatus using the same'2010 7,285,991'Semiconductor device for controlling switching power supply and switching power supply unit using the same'2007 7,259,973'Semiconductor apparatus for controlling a switching power supply'2007 7,208,985'Semiconductor device for controlling switching power supply'2007 7,150,677'CMP conditioner'2006 7,075,802'Semiconductor device for controlling switching power supply'2006 6,960,906'Switching power supply'2005 6,898,247'Apparatus for dividing, compressing and transmitting video data'2005 6,419,574'Abrasive tool with metal binder phase'2002 6,294,903'Switching power supply'2001 5,799,497'Refrigerating apparatus'1998 5,499,508'Air conditioner'1996 5,426,951'Air conditioning apparatus with cross control means therein'1995 5,394,048'High-voltage generator'1995 5,335,708'Cooling apparatus and temperature control method therefor'1994 5,201,187'System for controlling cooling equipment'1993 5,097,670'Water chilling method and apparatus for the same'1992 5,058,389'Fluid temperature control system and computer system using same'1991 5,052,472'LSI temperature control system'1991 5,052,897'Compressor and method of detecting quantity of mixture of coolant and lubricant in the compressor'1991 4,969,161'Apparatus for inputting and outputting data'1990 4,918,944'Falling film evaporator'1990 4,910,968'Refrigerating apparatus'1990

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1990–1994Patents assigned to HITACHI LTD (7)· patent assignee history

1990–1998Patents assigned to TOSHIBA KK (6)· patent assignee history

1990–1994Based in Shizuoka, JP· patent location history

1990–2019Based in Kanagawa, JP· patent location history

2001–2007Patents assigned to MATSUSHITA ELECTRIC INDUSTRIAL CO LTD (6)· patent assignee history

2001–2015Based in Osaka, JP· patent location history

2002–2006Based in Iwaki, JP· patent location history

2005–2012Based in Kyoto, JP· patent location history

2010–2012Patents assigned to PANASONIC CORP (5)· patent assignee history

2012–2015Patents assigned to YAMASHITA TETSUJI (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	7	1990–1994
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD	6	2001–2007
TOSHIBA KK	6	1990–1998
PANASONIC CORP	5	2010–2012
YAMASHITA TETSUJIself	3	2012–2015

Locations

Location	Patents	Span
Kyoto, JP	9	2005–2012
Shizuoka, JP	7	1990–1994
Kanagawa, JP	6	1990–2019
Osaka, JP	2	2001–2015
Iwaki, JP	2	2002–2006