2/1/59    escapement for timekeepers                         22,791     while in Rome, NY 
 

4/5/64    improvement in regulating watches                42,175     Patent reads Rome, NY.

3/7/65    improvement in chronometer-escapements    46,652     Albany, NY as all to follow

4/8/73    improvement in clock-escapements             137,603

7/27/75  improvements in tower-clocks                     165,991

7/15/84  escapement for clocks                               301,873

1/12/86  Microscope                                               334,009