Canada Patents Related to Insulators Listed by Patent Number
| Patent # | Date | Inventor(s)/Assignee(s) | Description | Notes |
| 103,943 | 3/5/1907 | Louis Steinberg (sic, probably Steinberger) of New York City, NY, USA | High Potential Insulator | |
| 104,623 | 4/9/1907 | Louis Steinberger of New York City, NY, USA | Insulator | |
| 104,787 | 4/16/1907 | Louis Steinberger of New York City, NY, USA | Insulator for High Voltages | |
| 105,496 | 5/28/1907 | Alexander Ephraim Brown of Cleveland, Ohio, USA assigned to Brown Hoisting Machinery Company | Insulator for tension guys | |
| 105,550 | 5/28/1907 | Louis Steinberger of New York City, NY, USA | Insulator | |
| 105,551 | 5/28/1907 | Louis Steinberger of New York City, NY, USA | Insulator | |
| 212,737 | 9/2/1921 | William Ratzlaff of Hugoton, Kansas | No-tie insulator with a side slot |
|
| 228,366 | 1/30/1923 | Albert Montan of North Battleford, Saskatchewan, Canada | No-tie insulator with a top slot |
|
| 467,199 |
8/8/1950 |
William D. Carruthers of St. Catharines, Ontario, Canada, assigned to Hayes Steel Products Limited, Merritton, Ontario, Canada | Means to fasten a wireholder to a support |
|
| 495,442 |
8/18/1953 | Frederick G. Ridgers, Hamilton, Ontario, Canada, assigned to N. Slater Company Limited, Hamilton, Ontario, Canada | Reinforced Wire Holder | |
Contributors of Information
Howard, Dan. (December 2000). Editor of Old Familiar Strains, a newsletter for collectors of radio strain insulators. Provided copies of two Canadian patents of no-tie insulator styles.