← Back to Companies

Sir Howard Grubb Parsons and Co Ltd

Sir Howard

Active Patents

0

Total Holdings

4

Patent Holdings

Filter in Explorer →

Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
GB1118969A	Improvements in and relating to monochromators	Expired / Lapsed	1965-10-27	—	0	Details
GB805544A	Improvements in or relating to sonic gas analysers	Expired / Lapsed	1956-01-06	—	0	Details
US3489484A	Reflecting members for optical instruments	Expired / Lapsed	1966-05-12	1970-01-13	0	Details
US2874564A	Sonic gas analysers	Expired / Lapsed	1955-11-15	1959-02-24	0	Details