Walter Helgeland

Follow

Person

Lexington, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Pulling head for a crystal growing furnace
- Patent number 4,663,128
- Issue date May 5, 1987
- Ferrofluidics Corporation
- Walter Helgeland
- C30 - CRYSTAL GROWTH
Information Patent Grant
Apparatus for and method of handling crystals from crystal-growing...
- Patent number 4,350,560
- Issue date Sep 21, 1982
- Ferrofluidics Corporation
- Walter Helgeland
- C30 - CRYSTAL GROWTH