Heikki I. Kankkunen

Follow

Person

Forssa, FI

People

Patents Grantslast 30 patents

Information Patent Grant
Method of compacting concrete by mutually synchronized reciprocatin...
- Patent number 4,751,033
- Issue date Jun 14, 1988
- Rakennusvalmiste Oy
- Heikki Kankkunen
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Ram casting machine for concrete slabs
- Patent number 4,674,970
- Issue date Jun 23, 1987
- Rakennusvalmiste Oy
- Heikki I. Kankkunen
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Concrete slab extruder with shear-action coring members
- Patent number 4,674,971
- Issue date Jun 23, 1987
- Rakennusvalmiste Oy
- Heikki I. Kankkunen
- B28 - WORKING CEMENT, CLAY, OR STONE