IPC code and Description table

IPC Code Description
G01N Measuring, Testing ? Investigating or analyzing materials by determining their chemical or physical properties
G06F Computing, calculating, counting - Electric Digital Data Processing
G07B Checking device - Ticket-issuing; Fare-Registering Apparatus; Franking apparatus
G06G Computing, calculating, counting ? Analogue computers
G06K Recognition of data; Presentation of data; Record carriers; Handling record carriers
G08B Signaling - Signaling Or Calling Systems; Order Telegraphs; Alarm Systems
H04Q Electric Communication Technique ? Selecting (Switches, relays etc.)