| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | United Kingdom | 3 | |
| #3 | Canada | 2 | |
| #4 | Austria | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Denmark | 1 | |
| #7 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Textiles and paper | |
| #3 | Machine tools | |
| #4 | Consumer goods | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Measuring speed and acceleration | |
| #2 | Paper coating | |
| #3 | Machines for making clothes | |
| #4 | Saddles | |
| #5 | Finishing work on buildings | |
| #6 | Percussive tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Knopf Carl | 13 |
| #2 | Knofp Paul | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB191400756A | Improvements in Recording Speedometers. | |
| GB190725724A | Improvements in Mallets. | |
| GB190715530A | Improvements in Speed Indicators | |
| US863404A | Mallet. | |
| US863403A | Speed-indicator. | |
| US865397A | Dress-skirt marker. | |
| US756507A | Stair-mat. | |
| US635556A | Stirrup. | |
| CA260837A | Waterproof textile | |
| CA321548A | Reflecting sign |