NL164396B - Overhead-projector met anti-verblindingsscherm. - Google Patents
Overhead-projector met anti-verblindingsscherm.Info
- Publication number
- NL164396B NL164396B NL6815702A NL6815702A NL164396B NL 164396 B NL164396 B NL 164396B NL 6815702 A NL6815702 A NL 6815702A NL 6815702 A NL6815702 A NL 6815702A NL 164396 B NL164396 B NL 164396B
- Authority
- NL
- Netherlands
- Prior art keywords
- overhead projector
- blinding
- screen
- blinding screen
- projector
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
- Optical Elements Other Than Lenses (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US68295167A | 1967-11-14 | 1967-11-14 | |
US71226268A | 1968-03-11 | 1968-03-11 | |
US71226368A | 1968-03-11 | 1968-03-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
NL6815702A NL6815702A (nl) | 1969-05-19 |
NL164396B true NL164396B (nl) | 1980-07-15 |
Family
ID=27418406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL6815702A NL164396B (nl) | 1967-11-14 | 1968-11-04 | Overhead-projector met anti-verblindingsscherm. |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS5126808B1 (nl) |
CH (1) | CH494975A (nl) |
DE (2) | DE1817823C3 (nl) |
FR (1) | FR1591751A (nl) |
GB (1) | GB1253237A (nl) |
NL (1) | NL164396B (nl) |
SE (1) | SE347581B (nl) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2914682C3 (de) * | 1979-04-11 | 1982-05-13 | Schott Glaswerke, 6500 Mainz | Verfahren zur Herstellung einer als Lichtblende wirkenden Glasplatte und nach diesem Verfahren hergestellte Glasplatte |
DE2937433C2 (de) * | 1979-09-15 | 1981-08-06 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Belichtungsanordnung |
DE3127247A1 (de) * | 1981-07-10 | 1983-01-20 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum herstellen eines jalousiefilters und vorrichtung zur durchfuehrung des verfahrens |
DE3414848A1 (de) * | 1983-04-26 | 1984-11-22 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Lichtdurchlaessiger verbundkoerper |
WO2021198888A1 (en) | 2020-03-31 | 2021-10-07 | Pi Industries Ltd. | An improved enzyme catalyzed carboxylation reaction |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3255665A (en) * | 1964-05-21 | 1966-06-14 | Minnesota Mining & Mfg | Article of manufacture for controlling light transmittance |
US3340765A (en) * | 1964-07-27 | 1967-09-12 | Bell Telephone Labor Inc | Projection system |
-
1968
- 1968-11-04 NL NL6815702A patent/NL164396B/nl not_active IP Right Cessation
- 1968-11-05 SE SE1496268A patent/SE347581B/xx unknown
- 1968-11-08 DE DE19681817823 patent/DE1817823C3/de not_active Expired
- 1968-11-08 DE DE19681808532 patent/DE1808532B2/de not_active Withdrawn
- 1968-11-13 CH CH1696068A patent/CH494975A/de not_active IP Right Cessation
- 1968-11-13 GB GB1253237D patent/GB1253237A/en not_active Expired
- 1968-11-13 FR FR1591751D patent/FR1591751A/fr not_active Expired
-
1970
- 1970-05-25 JP JP4410670A patent/JPS5126808B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
CH494975A (de) | 1970-08-15 |
DE1817823B2 (de) | 1974-01-03 |
JPS5126808B1 (nl) | 1976-08-09 |
SE347581B (nl) | 1972-08-07 |
DE1808532B2 (de) | 1972-01-27 |
DE1808532A1 (de) | 1969-08-07 |
FR1591751A (nl) | 1970-05-04 |
GB1253237A (nl) | 1971-11-10 |
DE1817823C3 (de) | 1974-07-25 |
NL6815702A (nl) | 1969-05-19 |
DE1817823A1 (de) | 1972-03-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
V1 | Lapsed because of non-payment of the annual fee |