| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 35 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ishida Kiyoshi | 32 |
| #2 | Tomisu Toshihisa | 3 |
| Publication | Filing date | Title |
|---|---|---|
| JP2020076209A | Buried box | |
| JP2010265599A | Structure of iron cover receiving frame | |
| JP2010168822A | Buried case | |
| JP2009007893A | Iron lid opening/closing device | |
| JP2006077392A | Iron-cover connecting structure | |
| JP2004332415A | Iron-cover open-close structure | |
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| JP2004332402A | Iron-cover connecting mechanism of buried box | |
| JP2004332395A | Embedded casing | |
| JP2003313895A | Iron cover receiving frame | |
| JP2003301474A | Iron cover step frame | |
| JP2003293386A | Sealing structure of iron lid | |
| JP2003239310A | Steel cover receiving frame structure | |
| JP2003227148A | Embedded case | |
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| JP2003221835A | Pedestal base for embedding case | |
| JP2002021105A | Buried case | |
| JP2002021103A | Rising structure of buried case | |
| JP2002004317A | Steel lid connecting structure for buried box | |
| JP2002004311A | Buried box |