Details
a) 143584 -- 1873
IMPROVEMENT IN CALIPERS
William H. Minor, Boston, MA
steel
5in. wide C.1;
b) 138113 -- 1873
TRY-SQUARE
Wilbur F. Arnold, Winthrop, CT
rosewood, steel and brass
4¼in. wide D.2;
c) 99917 -- 1870
IMPROVEMENT IN SLIDING SQUARE AND CALIPER
Lysander L. Lamb, Fitchburg, MA
steel
5½in. wide B.2 (3)
IMPROVEMENT IN CALIPERS
William H. Minor, Boston, MA
steel
5in. wide C.1;
b) 138113 -- 1873
TRY-SQUARE
Wilbur F. Arnold, Winthrop, CT
rosewood, steel and brass
4¼in. wide D.2;
c) 99917 -- 1870
IMPROVEMENT IN SLIDING SQUARE AND CALIPER
Lysander L. Lamb, Fitchburg, MA
steel
5½in. wide B.2 (3)