| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 3 | |
| #3 | United Kingdom | 2 | |
| #4 | Switzerland | 1 | |
| #5 | Germany | 1 | |
| #6 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Thermal processes | |
| #3 | Electrical machinery and energy | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Metal tempering | |
| #2 | Changing non-ferrous metals | |
| #3 | Special electric heating or lighting | |
| #4 | Furnaces | |
| #5 | Details of furnaces | |
| #6 | Chemical or physical laboratory devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Crocker Percival B | 7 |
| #2 | Maknis Walter | 2 |
| #3 | Murray Winter | 2 |
| #4 | Winter Murray | 1 |
| #5 | Walter Maknis | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1135626A | Improvements in or relating to methods and apparatus for the heat treatment of metal or alloy articles | |
| GB620282A | Improvements in and relating to furnaces | |
| US2421482A | Furnace | |
| US2126454A | Electric furnace | |
| US1962482A | Furnace | |
| US1898415A | Method of heating steel for hardening | |
| US1812837A | Means for heating steel for hardening | |
| US1745335A | Pot furnace and the like | |
| US1709340A | Electric heater | |
| US1744694A | Furnace with drain | |
| CA328507A | Steel heating method for hardening | |
| CA825653A | Heat treatment of metal | |
| CA455919A | Furnace |