Ella M. Duyck

Follow

Person

Philomath, OR, US

People

Patents Grantslast 30 patents

Information Patent Grant
Ink pen having a hydrophobic barrier for controlling ink leakage
- Patent number 5,600,358
- Issue date Feb 4, 1997
- Hewlett-Packard Company
- Marc A. Baldwin
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Pressure control apparatus for an ink pen
- Patent number 5,526,030
- Issue date Jun 11, 1996
- Hewlett-Packard Company
- Marc A. Baldwin
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS