DEWHURST & PARTNER LTD innovation strategy

Patent filings in countries

#	Industry
#1	Electrical machinery and energy
#2	Packaging and shipping
#3	Mechanical elements
#4	Civil engineering
#5	Machines
#6	Telecommunications

#	Technology
#1	Elevators and escalators
#2	Electric switches
#3	Clutches and brakes
#4	Electric motor controls
#5	Distribution of electric power
#6	Unspecified technologies
#7	Indexing scheme relating to hinges
#8	Cranes
#9	Transmission
#10	Wing fittings

Publication	Filing date	Title
DE2752926A1	1977-11-26	Release mechanism for normally engaged brake - has ratchet compensating for brake wear by allowing control rod to return under spring pressure (NL 31.5.78)
CA1061403A	1976-12-07	Induction motor brake circuit
AU2031176A	1976-12-07	Induction motor braking
GB1565510A	1976-09-17	Electrical drive arrangement
GB1502367A	1975-02-12	Brakes
GB1473327A	1974-09-23	Braking of polyphase ac induction motors
AU7117774A	1974-07-12	Improvements in or relating to lift door operator apparatus
GB1456391A	1973-03-21	Illuminated electrical push-botton switch
GB1466671A	1973-03-16	Lift car braking apparatus
GB1426879A	1972-06-19	Lifts
GB1339326A	1972-03-27	Display device
GB1358383A	1971-04-26	Panel mounted electrical apparatus
GB1357891A	1970-04-23	Electric motor control apparatus
US3623150A	1970-01-12	Contactor switch
US3526733A	1968-10-03	Tubular cam operating safety device
GB1219434A	1968-08-14	Lift floor selector
GB1270808A	1968-07-12	Transmission link
GB1174150A	1967-09-01	Safety Device for Lift or other Sliding Doors
GB1163806A	1967-08-30	Improvements in or relating to Elevator lifts
GB1177264A	1967-03-30	Position-Indicating Device