1. Automobile Transmission-Gearing; Original Pantent. (1920)
From US Patent Office: "Ole K. Bakken, of Northwood, North Dakota, Station Selector, Patent Number 1,335,811 Application filed March 11, 1919, Serial Number 281,956
2. Dial Telephone system, original patent. (1924)
From US Patent Office: "Ole K. Bakken, of Northwood, North Dakota, Station Selector, Patent Number 1,452,903
1. Automobile Transmission-Gearing; Original Pantent. (1920)
From US Patent Office: "Ole K. Bakken, of Northwood, North Dakota, Station Selector, Patent Number 1,335,811 Application filed March 11, 1919, Serial Number 281,956
2. Dial Telephone system, original patent. (1924)
From US Patent Office: "Ole K. Bakken, of Northwood, North Dakota, Station Selector, Patent Number 1,452,903
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