| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 10 | |
| #2 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Weighing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Harper Lyndus E | 7 |
| #2 | Coffman Paul A Jr | 3 |
| #3 | Hagenau Walter A | 1 |
| #4 | Birtwell William C | 1 |
| #5 | Kormos Kalman | 1 |
| #6 | Coffman Jr Paul A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2900110A | Gravimetric screw type feeders and weighers | |
| CA573810A | Differential pressure mechanism | |
| CA629714A | Feed measuring and controlling apparatus | |
| CA553297A | Continuous feeder | |
| CA586020A | Weighing scale beam sensitivity control | |
| CA540850A | Proportioning device | |
| CA552773A | Proportioning device | |
| CA633077A | Feed controlling apparatus | |
| CA553492A | Continuous weigher | |
| CA572165A | Controlling device | |
| CA506760A | Telemeteric apparatus |