| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 12 | |
| #2 | Canada | 4 | |
| #3 | Denmark | 1 |
| # | Industry | |
|---|---|---|
| #1 | Furniture and games | |
| #2 | Electrical machinery and energy | |
| #3 | Basic materials chemistry | |
| #4 | Consumer goods | |
| #5 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Domestic washing | |
| #2 | Dynamo-electric machines | |
| #3 | Laundering textiles | |
| #4 | Refining | |
| #5 | Electrically-conductive connections | |
| #6 | Treating harvested food |
| # | Name | Total Patents |
|---|---|---|
| #1 | Andries Christiaan Malchus Joh | 12 |
| #2 | Malchus Johannes Andries Chris | 5 |
| Publication | Filing date | Title |
|---|---|---|
| CA455968A | Vacuum cleaner with dust filter collecting the dust at its outside | |
| CA455967A | Vacuum cleaner with dust bag filtering the dust passing the bag from the outside | |
| CA463277A | Vacuum cleaner | |
| CA458023A | Combined dust aspirating floor cleaning machine |