Patent classifications
G
PHYSICS
Load children
G07
CHECKING-DEVICES
Load children
G07C
TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
Load children
2209/00
Indexing scheme relating to groups G07C9/00 - G07C9/38
Load children Filter patents View analytics View as hierarchy
G07C2209/08
With time considerations, e.g. temporary activation, valid time window or time limitations
Filter patents View analytics View as hierarchy