NAT PNEUMATIC CO innovation strategy

Patent filings in countries

#	Industry
#1	Civil engineering
#2	Machines
#3	Mechanical elements
#4	Transport
#5	Electrical machinery and energy
#6	Engines, pumps and turbines

#	Technology
#1	Wing fittings
#2	Indexing scheme relating to hinges
#3	Railway bodies
#4	Unspecified technologies
#5	Servomotors
#6	Electric switches
#7	Unspecified technologies
#8	Venting or aerating devices
#9	Locks
#10	Machines

Publication	Filing date	Title
GB682518A	1949-11-04	Door operation and control
GB652710A	1948-04-26	Improvements in vehicle door operating mechanisms
GB629592A	1946-01-28	Improvements in moisture ejection device for air pressure systems
US2638340A	1945-06-28	Door opening apparatus
US2410799A	1945-03-02	Moisture ejection device for air pressure systems
US2419964A	1945-02-27	Spring return push door with door lock
GB606796A	1944-10-16	Improvements in door operator
GB572249A	1943-12-07	Improvements in door operation
US2368722A	1943-10-29	Door operator
US2377986A	1943-07-15	Unit and multiple door operator
US2343316A	1943-03-30	Door operator
US2439184A	1943-01-23	Magnetic flaw detector
US2346009A	1942-08-06	Electric treadle
GB544653A	1940-10-18	Improvements in door operating system
ES150623A1	1940-10-16	A door operating system
GB544162A	1940-09-30	Improvements in power operated doors
US2263053A	1940-07-17	Multiple wiper operating mechanism
US2259579A	1940-07-06	Spring return push door
US2242435A	1939-12-18	Strand feeding mechanism
US2233060A	1939-12-02	Combined clutch and brake