Ritsuo Koga
Inventor
Stats
- 5 US patents issued
- 11 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 5 US Patents Issued
- 11 US Applications Filed
- 149 Total Citation Count
- Mar 31, 2021 Most Recent Filing
- Oct 6, 1987 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| ZERO LAB CO., LTD. | 2
| 2017
|
| PLUS CORPORATION | 1
1 1 1 1 | 1987
1989 1995 1998 1999 |
Inventor Addresses
| Address | Duration |
|---|---|
| Tokyo, JP | Jan 31, 89 - Feb 15, 24 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| B32B: | LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM | 1 |
| B43K: | IMPLEMENTS FOR WRITING OR DRAWING | 2 |
| B43L: | ARTICLES FOR WRITING OR DRAWING UPON; ACCESSORIES FOR WRITING OR DRAWING | 5 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 2024/0053,833 | 2024 | Magnetic Sheet, Magnetic Writing System, Drawing Method, and Erasing Method | 0 |
| 11769429 | 2023 | Magnetic erasing device | 0 |
| 11335487 | 2022 | Magnetic eraser, writing system and display device | 0 |
| 2021/0313,105 | 2021 | MAGNETIC ERASER, WRITING SYSTEM AND DISPLAY DEVICE | 0 |
| 2021/0217,332 | 2021 | MAGNETIC ERASING DEVICE | 0 |
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