| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 34 | |
| #2 | Republic of Korea | 5 | |
| #3 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Furniture and games | |
| #3 | Machines | |
| #4 | Environmental technology | |
| #5 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Brushes | |
| #2 | Domestic washing | |
| #3 | Climate change mitigation in goods production | |
| #4 | Planting | |
| #5 | Shaping of plastics | |
| #6 | Certain plastics | |
| #7 | Household appliances |
| # | Name | Total Patents |
|---|---|---|
| #1 | Katsukawa Yoshitaka | 34 |
| #2 | Katsukawa Takahito | 16 |
| #3 | Katsukawa Takato | 3 |
| Publication | Filing date | Title |
|---|---|---|
| JP2019088541A | Washing tool | |
| JP2015024105A | Sliding washer | |
| JP2012143440A | Sliding washer | |
| JP2011143044A | Scrubber | |
| JP2011115370A | Scrubber | |
| KR20110003239A | Scrubber | |
| JP2011055874A | Scrubber | |
| JP2010188063A | Scrubber with handle | |
| JP2009261882A | Scrubber with groove washing tool | |
| JP2007210648A | Container for interdental brush | |
| JP2007209567A | Interdental brush housing package | |
| JP2007021047A | Scrubbing device | |
| JP2006087647A | Legged scrubber | |
| JP2005349101A | Scrubber with handle | |
| JP2005342073A | Rub-washing implement with scraper | |
| JP2005177168A | Sliding washing implement | |
| JP2005006701A | Scrubber with detergent vessel | |
| JP2004121646A | Scrubbing utensil and its manufacturing method | |
| JP2004065619A | Scrub washer | |
| JP2004041288A | Rub-washing implement |