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2227020
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Information
Patent Grant
2227020
References
Source
Patent Number
2,227,020
Date Filed
Not available
Date Issued
Tuesday, December 31, 1940
84 years ago
CPC
H01J29/58 - Arrangements for focusing or reflecting ray or beam
E01C7/085 - Aggregate or filler materials therefor; Coloured reflecting or luminescent additives therefor
E01C7/182 - Aggregate or filler materials, except those according to E01C7/26
E01C7/351 - with exclusively hydraulical binders; Aggregate, fillers or other additives for application on or in the surface of toppings with exclusively hydraulic binders
E01F9/506 - characterised by the road surface marking material
US Classifications
315 - Electric lamp and discharge devices: systems
313 - Electric lamp and discharge devices
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