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| All Patents in class 336/92 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 287,170 | Oct. 23, 1883 | A.H. Roovers, A.W. Roovers | Electric cane | |
 | 530,597 | Dec. 11, 1894 | A.W. Meston | Alternating-current transformer | |
 | 628,957 | Jul. 18, 1899 | J.W. Packard | Electric transformer | |
 | 1,427,783 | Sep. 05, 1922 | J. Burke | Air-cooled transformer | |
| 2,346,094 | Apr. 04, 1944 | E.A. Vogel | Ignition Device | ||
 | 2,428,234 | Sep. 30, 1947 | A.G. Mapp | Internal Micrometer | |