Patents for inventions; abridgments intended to serve as guides to specifications. (class 118 (ii), period 1921-25)
Signals (including marine signals)
Abridgments Specifications
1928
259 pages
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Signals including marine signals
Engineering Index Backfile | 1925
Safety at sea through marine signals
Engineering Index Backfile | 1955
|FOCUS SIGNALS - Mixed Signals - Intelligent use of LED signals
Online Contents | 2002
Railroad color light signals including wind reduction elements
European Patent Office | 2023
|RAILROAD COLOR LIGHT SIGNALS INCLUDING WIND REDUCTION ELEMENTS
European Patent Office | 2022
|