FULLER, JOHN E. |
USA, fl.1845-47, MIM |
Time Telegraph, with Calculator, 1845 = WHI; Circular Slide Rule, Palmer-Type = P.C. |
invented a circular slide rule, "The Time Telegraph" to figure the number of days between any two dates; patented in 1845; bought out Aaron Palmer and improved Palmer's slide rule by adding his rule to the back of the instrument in 1847; Delehar thought he was George Fuller. |
Boston, Mass. |
G.L'E. Turner 24; Delehar 9; RSW. |
|
|
|
|
|
|