| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Austria | 3 | |
| #3 | Canada | 3 | |
| #4 | Spain | 3 | |
| #5 | Switzerland | 2 | |
| #6 | Denmark | 2 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Stringed musical instruments |
| # | Name | Total Patents |
|---|---|---|
| #1 | Clutsam Frederick | 16 |
| #2 | Jacob Ernst | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB107241A | Improvements in or relating to Pianoforte-hammer Actions. | |
| GB191507663A | Improvements in or relating to Hammer-actions for Upright Pianofortes. | |
| GB191027890A | Improvements in or relating to Keyboards for Pianofortes and other Musical Instruments. | |
| CA126420A | Keyboard for pianofortes, organs, etc. | |
| CA117494A | Pianoforte, organ, etc. | |
| US971172A | Keyboard. | |
| GB190712323A | Improvements in Pianofortes, Organs and like Musical Instruments. | |
| CA103289A | Pianoforte, organ, etc. |