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Brunton Pocket Transit Evolution

1894

The original patent: 526,021, Sept. 18, 1894, D. W. Brunton

1912

Addition of the tripod mount: 1,042,079, Oct. 22, 1912, D. W. Brunton

1913

Addition of the rear sight: 1,062,582, May 27, 1913, D. W. Brunton

1914

Addition of the "figure-eight" peep sight: 1,092,822, Apr. 14, 1914, D. W. Brunton

1920

The "Illuminated Transit": 1,339,019, 4 May 1920, D. W. Brunton
 

1926

The K&E addition of the 'bullseye' level: 1,571,697, Feb. 2, 1926, K&E

 Addtion of the Percent Grade scale: 1,593,429, July 20, 1926, D. W. Brunton