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For the Inventor, By the Inventor

Moscow, Russia

Efim A Freiman

This inventor holds 4 USPTO granted patents. Top assignee: Other. Active years: 1982-1990.

USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 8.9

ph-index = 4

Forward Citations = 48(Granted Patents)


Company Filing History:

goldMedal4 out of 834,350 
Other
 patents

Years Active: 1982-1990

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4 patents (USPTO):Explore Patents
1. 4957713 - Apparatus for growing shaped single crystals (1990-09-18),
2. 4915773 - Process for growing shaped single crystals (1990-04-10),
3. 4416723 - Method for producing sapphire tubes (1983-11-22),
4. 4325917 - Method and apparatus for producing sapphire tubes (1982-04-20),
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