SH Thomson Manufacturing Co

SH Thomson

Active Patents

Total Holdings

Patent Holdings

Patent No.	Title	Status	Filing Date	Grant Date	Actions
US2275299A	Spot lamp attachment	Expired / Lapsed	1940-10-17	1942-03-03	Details
US2108328A	Automatic operator for casement windows and the like	Expired / Lapsed	1935-10-04	1938-02-15	Details
US1989199A	Check valve	Expired / Lapsed	1933-10-30	1935-01-29	Details