|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G04 |
HOROLOGY

|  | G04B |
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS (spring- or weight-driven mechanisms in general Fulltext... Hierarchy... Expanded...F03G; electric parts of clocks or watches Fulltext... Hierarchy... Expanded...G04C; clocks or clock mechanisms with attached or built-in means operating any device at preselected time or after predetermined time intervals Fulltext... Hierarchy... Expanded...G04C 23/00; clocks or watches with stop devices Fulltext... Hierarchy... Expanded...G04F 7/08)

|  | G04B |
Note(s) This sub-class includes mechanically-driven calendar clocks or clockwork calendars, and the mechanical part of such clocks or calendars.

|  | G04C |
ELECTRIC CLOCKS OR WATCHES (mechanical parts of clocks or watches in general Fulltext... Hierarchy... Expanded...G04B)

|  | G04C |
Note(s) This sub-class includes electric features of mechanically-driven clocks or watches, such as electric winding of such clocks or the provision of electric contacts thereon.

|  | G04D |
APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES (machine tools in general Fulltext... Hierarchy... Expanded...B23, Fulltext... Hierarchy... Expanded...B24; hand tools in general Fulltext... Hierarchy... Expanded...B25)

|  | G04F |
SHORT TIME-INTERVAL MEASURING, e.g. PRECISION SYSTEMS (in radar or like systems Fulltext... Hierarchy... Expanded...G01S)