| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 9 | |
| #2 | Austria | 2 | |
| #3 | Switzerland | 1 | |
| #4 | Spain | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Measuring force, work and fluid pressure |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hammond Laurens | 13 |
| Publication | Filing date | Title |
|---|---|---|
| US1015886A | Barometer. | |
| CA384065A | Multiple key switch for musical instruments | |
| CA376653A | Variable impedance device | |
| CA243735A | Apparatus for stereoscopic shadowgraphs | |
| CA413446A | Electric musical instrument | |
| CA413447A | Electric musical instrument | |
| CA408460A | Electrical musical instrument | |
| CA395554A | Electrical musical instrument | |
| CA395553A | Electrical musical instrument | |
| CA355122A | Electrical musical instrument |