IPC Definitions - January 01, 2012

G01S 17/48 - Definition fr

Informative references

Attention is drawn to the following places, which may be of interest for search:

Passive systems using a parallactic triangle

G01C 3/10, G01C 3/22, G01C 3/24, G01C 3/26

Active systems for automatic generation of focusing signals

G02B 7/32