| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Canada | 5 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machine tools | |
| #3 | Engines, pumps and turbines | |
| #4 | Machines | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Special electric heating or lighting | |
| #2 | Hand-held cutting tools | |
| #3 | Starting of combustion engines | |
| #4 | Bending wood | |
| #5 | Unspecified technologies | |
| #6 | Springs |
| # | Name | Total Patents |
|---|---|---|
| #1 | Knight John A | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US2249476A | Electric hot plate | |
| US2029075A | Electric heating element | |
| US1911123A | Motor heater | |
| US1941149A | Hydraulic shock absorber and the like | |
| US792271A | Machine for sawing, matching, and jointing staves. | |
| US767647A | Combination paper-knife and mail-opener. | |
| CA6231A | Improvements in catapults | |
| CA3178A | Drawing or writing table | |
| CA313641A | Motor heater | |
| CA221803A | Rebound absorber for vehicles | |
| CA427746A | Electric hot plate |