PatentBrief

Company Portfolio

Hewlett Packard Co

Patents indexed

1

Year range

1984

consumer_electronicsmechanical

Key Inventors

John L. Vaught1Frank L. Cloutier1David K. Donald1John D. Meyer1Christopher A. Tacklind1Howard H. Taub1

All Patents

1

Career timeline

1 patents, in 1984

Dot size = forward citations

19841985

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US 4490728·1984

How Thermal Inkjet Printers Use Two-Step Heating to Shoot Ink

Hewlett-Packard's 1982 patent on a two-stage electrical pulse method that preheats ink before vaporizing it, allowing thermal inkjet printers to reliably eject precise droplets without clogging.

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