GB9219921D0 - Protactor - Google Patents
ProtactorInfo
- Publication number
- GB9219921D0 GB9219921D0 GB929219921A GB9219921A GB9219921D0 GB 9219921 D0 GB9219921 D0 GB 9219921D0 GB 929219921 A GB929219921 A GB 929219921A GB 9219921 A GB9219921 A GB 9219921A GB 9219921 D0 GB9219921 D0 GB 9219921D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- protactor
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
- G01B3/563—Protractors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB929203563A GB9203563D0 (en) | 1992-02-20 | 1992-02-20 | Protractor with a rotor |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9219921D0 true GB9219921D0 (en) | 1992-11-04 |
GB2264364A GB2264364A (en) | 1993-08-25 |
GB2264364B GB2264364B (en) | 1994-11-30 |
Family
ID=10710710
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB929203563A Pending GB9203563D0 (en) | 1992-02-20 | 1992-02-20 | Protractor with a rotor |
GB9219921A Expired - Fee Related GB2264364B (en) | 1992-02-20 | 1992-09-21 | Protractor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB929203563A Pending GB9203563D0 (en) | 1992-02-20 | 1992-02-20 | Protractor with a rotor |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB9203563D0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103575173A (en) * | 2013-11-25 | 2014-02-12 | 郭永然 | 180-degree vernier protractor |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1022014C2 (en) * | 2002-11-28 | 2004-06-02 | Cornelis Jan Admiraal | Compass, comprises first disc with angle markings and null line and transparent second disc with direction indicator line |
CN102012207B (en) * | 2010-12-13 | 2012-05-09 | 山东科技大学 | Angle measuring instrument |
ITUB20154634A1 (en) * | 2015-10-12 | 2017-04-12 | Franco Carboni | A GONIOGRAPH |
CN105806171A (en) * | 2016-04-11 | 2016-07-27 | 黄友谊 | Measuring structure achieved by means of double concentric circles, method and application of the method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB655224A (en) * | ||||
GB339980A (en) * | 1929-09-11 | 1930-12-11 | Horace Edwin Brimfield | Improved protractor |
GB589758A (en) * | 1945-03-31 | 1947-06-30 | Alan Sproxton | Combined calculating-device and protractor |
CH251900A (en) * | 1946-07-05 | 1947-11-30 | Rueedi Oskar | Drawing apparatus on drawing boards. |
GB663970A (en) * | 1949-06-22 | 1951-01-02 | George Alfred Crook | Improvements relating to drawing instruments |
US3460261A (en) * | 1968-01-24 | 1969-08-12 | Arnold J Frey | Drafting device |
US4791733A (en) * | 1987-07-22 | 1988-12-20 | Huey Bao Co., Ltd. | Student's multi-function protractor |
-
1992
- 1992-02-20 GB GB929203563A patent/GB9203563D0/en active Pending
- 1992-09-21 GB GB9219921A patent/GB2264364B/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103575173A (en) * | 2013-11-25 | 2014-02-12 | 郭永然 | 180-degree vernier protractor |
Also Published As
Publication number | Publication date |
---|---|
GB2264364A (en) | 1993-08-25 |
GB9203563D0 (en) | 1992-04-08 |
GB2264364B (en) | 1994-11-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020921 |