TNAG-2890-FCO40-4162-Reform-and-localisation-of-the-Hong-Kong-Patent-System-1993 — Page 142

300

TABLE E (Cont.)

Patents registered in Hong Kong 1980 1990

Class F

250

200

150

100

50

0

01

02

03

04

15

16

17

21

22

24

25

1 2 3

Section F

-

I..

4 15

15 16 17 21 22 24 25 26 27 28 41 42

Mechanical Engineering, Lighting; Heating; Weapons; Blasting

Machines or engines in general; Engine plants in general; Steam engines Combustion engines; Hot-gas or combustion product engine plants Machines or engines for liquid; Wind, spring, weight and miscellaneous motors; Producing mechanical power, or a reactive propulsive thrust, not otherwise provided for

Positive-displacement machines for liquids; pumps for liquids or elastic

fluids

Fluid-pressure actuation; Hydraulics or pneumatics in general Engineering elements and units; General measures for producing and maintaining effective functioning of machines or installations

Storing or distributing gases or liquids

Lighting

Steam generation

Heating; Ranges; Ventilating

Refrigeration and cooling; Manufacture and storage of ice; Liquefaction

and solidification of gases

Furnaces; Kilns; Ovens; Retorts

26

Drying

27

28

41

42

Heat exchange in general

Weapons

Ammunition; Blasting

70