NL22672C - - Google Patents
Info
- Publication number
- NL22672C NL22672C NL22672DA NL22672C NL 22672 C NL22672 C NL 22672C NL 22672D A NL22672D A NL 22672DA NL 22672 C NL22672 C NL 22672C
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/389—Precious stones; Pearls
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Farming Of Fish And Shellfish (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN24745D DE467054C (de) | 1925-06-27 | 1925-06-27 | Verfahren zur Unterscheidung von Japanperlen mit Perlmutterkern gegenueber echten Naturperlen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL22672C true NL22672C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) |
Family
ID=7343146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL22672D NL22672C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1925-06-27 |
Country Status (4)
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2467562A (en) * | 1943-06-21 | 1949-04-19 | Thompson Prod Inc | Method and apparatus for magnetically testing valves for sodium content |
| US3393359A (en) * | 1960-04-27 | 1968-07-16 | Creighton A Burk | Apparatus including fluid support means for magnetic determination of core orientation |
| US3183434A (en) * | 1961-10-30 | 1965-05-11 | Martin F Auer | Universal rotation method and apparatus for locating axes in single spherical ferrimagnetic crystals |
| US3375438A (en) * | 1966-08-08 | 1968-03-26 | Army Usa | Method and means for orienting crystals by alternate application of angularly spacedmagnetic fields |
| US5559436A (en) * | 1994-11-21 | 1996-09-24 | Marion Matthews | Method and apparatus for distinguishing synthetic diamonds from natural diamonds |
| US6281680B1 (en) | 1994-11-21 | 2001-08-28 | Marion Matthews | Method and apparatus for distinguishing synthetic diamonds from natural diamonds |
| BE1015022A3 (nl) * | 2002-07-05 | 2004-08-03 | Wetenschappelijk En Tech Onder | Werkwijze en inrichting voor het onderscheiden van edelstenen. |
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0
- NL NL22672D patent/NL22672C/xx active
-
1925
- 1925-06-27 DE DEN24745D patent/DE467054C/de not_active Expired
-
1926
- 1926-06-08 FR FR617212D patent/FR617212A/fr not_active Expired
- 1926-06-22 GB GB15696/26A patent/GB254307A/en not_active Expired
- 1926-06-23 GB GB15780/26A patent/GB267462A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB254307A (en) | 1927-09-29 |
| DE467054C (de) | 1928-10-18 |
| FR617212A (fr) | 1927-02-16 |
| GB267462A (en) | 1927-09-23 |