LUDWIG WALTER D innovation strategy

Patent filings in countries

#	Country	Total Patents
#1	United States	14
#2	Canada	7

#	Industry
#1	Mechanical elements
#2	Machines
#3	Electrical machinery and energy
#4	Measurement
#5	Machine tools

#	Technology
#1	Unspecified technologies
#2	Venting or aerating devices
#3	Servomotors
#4	Magnets and transformers
#5	Presses
#6	Measuring electric variables
#7	Mechanical control devices

#	Name	Total Patents
#1	Ludwig Walter D	21

Publication	Filing date	Title
US3238964A	1963-04-29	Time delay apparatus with in-line construction for bi-directional flow
US3256906A	1963-02-05	Bi-directional time delay valve
US3101741A	1961-04-12	Pilot air operated valve
US3079951A	1960-11-01	Rotary solenoid four-way valve
US3051187A	1959-10-29	Press safety valve
US3062236A	1959-06-17	Dual seal valve
US3012578A	1959-03-16	Double plunger solenoid valve
US3089517A	1958-07-17	Compound valve
US2872944A	1953-12-04	Hand valve
US2780755A	1953-07-29	Solenoid design
US2782801A	1953-01-16	Sliding valve spool seal
US2739274A	1951-06-01	Solenoid stop bracket
US2693716A	1950-08-04	Valve operating pedal
US2638122A	1948-02-18	Valve
CA684592A	None	Compound valve
CA586571A	None	Sliding valve spool seal
CA520467A	None	Valve
CA676018A	None	Rotary solenoid four-way valve
CA886112A	None	Shell violin with floating sound board
CA748686A	None	Fluid actuated time delay valve