FR907856A - Colorimètre philatélique - Google Patents
Colorimètre philatéliqueInfo
- Publication number
- FR907856A FR907856A FR907856DA FR907856A FR 907856 A FR907856 A FR 907856A FR 907856D A FR907856D A FR 907856DA FR 907856 A FR907856 A FR 907856A
- Authority
- FR
- France
- Prior art keywords
- philatelic
- colorimeter
- philatelic colorimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
- G01N21/293—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection with colour charts, graduated scales or turrets
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR907856T | 1944-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR907856A true FR907856A (fr) | 1946-03-25 |
Family
ID=9406635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR907856D Expired FR907856A (fr) | 1944-05-23 | 1944-05-23 | Colorimètre philatélique |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR907856A (fr) |
| GB (1) | GB617172A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8523071D0 (en) * | 1985-09-18 | 1985-10-23 | Crutch S A | Detector/indicator of visible information |
-
1944
- 1944-05-23 FR FR907856D patent/FR907856A/fr not_active Expired
-
1946
- 1946-02-26 GB GB5989/46A patent/GB617172A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB617172A (en) | 1949-02-02 |
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