STANDARD PLUNGER ELEVATOR COMPANY innovation strategy

Patent filings in countries

#	Country	Total Patents
#1	United States	25

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

Publication	Filing date	Title
US1275407A	1917-11-08	Automatic limit-switch.
US1249043A	1916-06-17	Limit-switch mechanism.
US1287581A	1916-05-05	Elevator system.
US1246894A	1915-12-29	Elevator-control lock.
US1165653A	1915-11-08	Elevator valve mechanism.
US1242928A	1915-10-12	Hydraulic-motor-controlling mechanism.
US1136678A	1914-10-16	Hydraulic plunger-elevator.
US1136140A	1914-09-09	Hydraulic elevator.
US1212154A	1914-04-07	Speed-regulator for elevators.
US1255866A	1913-11-13	Signal system for elevators.
US1094998A	1913-09-24	Hydraulic elevator.
US1156987A	1913-09-12	Automatic elevator control.
US1222854A	1913-09-10	Operating box-controlled dumb-waiter system.
US1169722A	1912-09-20	Automatic stop for elevators.
US1223157A	1912-05-25	Elevator-door-locking mechanism.
US1234644A	1911-02-28	Automatic elevator.
US1212195A	1910-02-05	Elevator safety controlling mechanism.
US1150424A	1909-11-17	Elevator driving-gearing.
US1037879A	1909-09-03	Pumpimg system.
US1184169A	1909-08-07	Elevator system.