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Len Dorfman founded
PRODUCT DEVELOPMENT RESOURCES in
1994, following 24 years of product design for many
recognized companies. From "Start-ups" to multinational
corporations, Len has been creating new products as well
as participating in the business side of industry.
Partial Client List:
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Alliance Instruments
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Astec
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Hewlett Packard
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Intel
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Micro-Power Electronics
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Sentrol
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Timex
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Veris Industries
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Patents issued to Leonard M. Dorfman and assigned.
Click on each patent number to view United States Patent Information.
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PAT. NO. |
Title |
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5,835,185 |
Spring-hinged frame for eyewear |
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5,657,150 |
Electrochromic edge isolation-interconnect system, process, and
device for its manufacture |
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5,455,638 |
Electrochromic eyewear |
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5,455,637 |
Electrochromic eyewear system, rechargeable eyewear and external
charger therefore |
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4,624,529 |
Liquid
crystal display with central interconnections |
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D278,986 |
Electro-optic display for a timepiece |
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4,435,088 |
Battery
switch plate for a timepiece |
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4,247,928 |
Integral lightpipe and display holder for a timepiece
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