| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 23 | |
| #2 | Canada | 17 | |
| #3 | France | 9 | |
| #4 | United Kingdom | 8 | |
| #5 | Germany | 6 | |
| #6 | Denmark | 2 | |
| #7 | Belgium | 1 | |
| #8 | Switzerland | 1 | |
| #9 | Netherlands | 1 | |
| #10 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Machines | |
| #3 | Measurement | |
| #4 | Mechanical elements | |
| #5 | Control | |
| #6 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Person Ernest H | 14 |
| #2 | Hedrick Warren R | 7 |
| #3 | Hjalmar Person Ernest | 6 |
| #4 | Edwards Albert S | 4 |
| #5 | Batchelor William L | 4 |
| #6 | Hedrick W | 3 |
| #7 | Person E | 2 |
| #8 | Wessels William | 2 |
| #9 | Walsh W | 2 |
| #10 | Batchelor William Loring | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US3948155A | Air diffusers | |
| US3854386A | Air diffusers | |
| CA946205A | Floor register | |
| US3683786A | Operating device for register valve | |
| US3640307A | Apparatus for balancing fluid distribution systems | |
| US3516606A | Air-conditioning temperature volume controller | |
| US3589265A | Floor register | |
| US3592240A | Damper unit for controlling air flow | |
| US3366031A | Air diffuser assembly including latching means | |
| US3292692A | Finned tube heat exchanger | |
| US3313380A | Piston dampener | |
| US3276349A | Air diffuser | |
| US3260188A | Air diffuser | |
| DE1274315B | Air distributor housing | |
| US3166001A | Air distribution unit | |
| US3185067A | Slot diffuser | |
| US3250318A | Baseboard heater | |
| US3107597A | Air diffuser | |
| US3191615A | Automatic fluid controller | |
| US3119320A | Air damper |