BE728662A - - Google Patents
Info
- Publication number
- BE728662A BE728662A BE728662DA BE728662A BE 728662 A BE728662 A BE 728662A BE 728662D A BE728662D A BE 728662DA BE 728662 A BE728662 A BE 728662A
- Authority
- BE
- Belgium
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
- G06C1/00—Computing aids in which the computing members form at least part of the displayed result and are manipulated directly by hand, e.g. abacuses or pocket adding devices
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8868/68A GB1235923A (en) | 1968-02-23 | 1968-02-23 | Calculating instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE728662A true BE728662A (xx) | 1969-08-01 |
Family
ID=9860819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE728662D BE728662A (xx) | 1968-02-23 | 1969-02-19 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3526973A (xx) |
| AT (1) | AT294460B (xx) |
| BE (1) | BE728662A (xx) |
| CH (1) | CH482256A (xx) |
| DE (1) | DE1908563A1 (xx) |
| FR (1) | FR2002480A1 (xx) |
| GB (1) | GB1235923A (xx) |
| IE (1) | IE32966B1 (xx) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3937929A (en) * | 1973-06-18 | 1976-02-10 | Peter Knauer | Method for identifying selected inventory items and reading the sum of their values |
| US3871114A (en) * | 1974-05-17 | 1975-03-18 | Joseph Honig | Device for teaching the addition of fractions |
| US4354842A (en) * | 1981-05-28 | 1982-10-19 | Baldwin, Stoddard & Co. | System for utilizing interactive blocks to teach arithmetic |
| GB2227862B (en) * | 1988-12-14 | 1993-06-02 | Martin Gaskell | An operations processor |
| US5545042A (en) * | 1992-10-20 | 1996-08-13 | Barrows; Irvin R. | Learning board in combination with solution lists |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2899757A (en) * | 1959-08-18 | Add-up block toy for teaching arithmetic | ||
| US1183570A (en) * | 1915-11-02 | 1916-05-16 | John Kneeshaw | Educational appliance. |
| US1594376A (en) * | 1924-05-24 | 1926-08-03 | Passmore Arthur Augustine | Device for teaching numbers in combination, analysis, factors, and multiples |
| US2486260A (en) * | 1945-10-31 | 1949-10-25 | Clifford C Church | Educational appliance |
| US3410002A (en) * | 1966-10-24 | 1968-11-12 | Eric H. Mulholland | Educational aid for teaching mathematics |
-
1968
- 1968-02-23 GB GB8868/68A patent/GB1235923A/en not_active Expired
-
1969
- 1969-02-17 IE IE205/69A patent/IE32966B1/xx unknown
- 1969-02-18 US US800212A patent/US3526973A/en not_active Expired - Lifetime
- 1969-02-18 AT AT162569A patent/AT294460B/de not_active IP Right Cessation
- 1969-02-19 CH CH249769A patent/CH482256A/de not_active IP Right Cessation
- 1969-02-19 BE BE728662D patent/BE728662A/xx unknown
- 1969-02-20 DE DE19691908563 patent/DE1908563A1/de active Pending
- 1969-02-21 FR FR6904415A patent/FR2002480A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| IE32966L (en) | 1969-08-23 |
| IE32966B1 (en) | 1974-02-06 |
| AT294460B (de) | 1971-11-25 |
| DE1908563A1 (de) | 1970-08-13 |
| GB1235923A (en) | 1971-06-16 |
| CH482256A (de) | 1969-11-30 |
| US3526973A (en) | 1970-09-08 |
| FR2002480A1 (xx) | 1969-10-17 |