Inventor
Tomomitsu Yokoyama
Inventor
Tokyo, JP
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C22Cprimary
C22CAlloys39%
B23KSoldering or unsoldering11%
C09KMaterials for miscellaneous applications, not provided for elsewhere6%
C23FNon-mechanical removal of metallic material from surface6%
F22BMethods of steam generation6%
F23CMethods or apparatus for combustion using fluid fuel or solid fuel suspended in a carrier gas or air6%
F23DBurners6%
F28FDetails of heat-exchange and heat-transfer apparatus, of general application6%
H01LSemiconductor devices6%
H10DInorganic electric semiconductor devices6%
PatentTitleYear
10,920,326Etchant composition for etching titanium layer or titanium-containing layer, and etching method20216,659,024'Powdery fuel combustion apparatus'20036,379,611'High strength, low alloy, heat resistant steel'20025,945,064'Welding material for low chromium (Cr) ferritic steel having high toughness'19995,814,274'Low-Cr ferritic steels and low-Cr ferritic cast steels having excellent high teperature strength and weldability'19985,746,843'Low Mn-low Cr ferritic heat resistant steel excellent in strength at elevated temperatures'19985,407,635'Low-chromium ferritic heat-resistant steel with improved toughness and creep strength'19955,240,516'High-chromium ferritic, heat-resistant steel having improved resistance to copper checking'19935,211,909'Low-alloy heat-resistant steel having improved creep strength and toughness'19935,143,024'Pressure fluidized bed firing boiler'1992Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1992–2003Patents assigned to MITSUBISHI HEAVY IND LTD (9)· patent assignee history
1992–2021Based in Tokyo, JP· patent location history
1993–2002Patents assigned to SUMITOMO METAL IND (5)· patent assignee history
1993Based in Chofu, JP· patent location history
2021Patents assigned to KANTO KAGAKU (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| MITSUBISHI HEAVY IND LTD | 9 | 1992–2003 |
| SUMITOMO METAL IND | 5 | 1993–2002 |
| KANTO KAGAKU | 1 | 2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Tokyo, JP | 9 | 1992–2021 |
| Chofu, JP | 1 | 1993 |