US3302008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplication device
Assignee: ExxonMobil Upstream Research Co
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Filing: 1964-01-16
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Granted: 1967-01-31
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Expires: 1984-01-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Roscoe W Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/38; G06F7/48; G06F7/52; G06F7/523; G06F7/525
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
AN APPARATUS FOR OBTAINING A PRODUCT OF A MULTIPLIER AND A MULTIPLICAND WHICH COMPRISES: (A) REVERSING MEANS FOR REVERSING THE ORDER OF THE DIGITS OF THE MULTIPLIER TO OBTAIN A REVERSED MULTIPLIER; (B) MEANS TO SEQUENTIALLY SHIFT THE DIGITS OF THE REVERSED MULTIPLIER WITH RESPECT TO THE MULTIPLICAND FROM A FIRST POSITION IN WHICH THE LEAST SIGNIFICANT DIGIT OF THE MULTIPLICAND IS IN EFFECT, ALIGNED WITH THE LEAST SIGNIFICANT DIGIT OF THE REVERSED MULTIPLIER TO A LAST POSITION WHEREIN THE MOST SIGNIFICANT DIGIT OF THE MULTIPLICAND IS ALIGNED WITH THE MOST SIGNIFICANT DIGIT OF THE REVERSED MULTIPLIER; (C) MEANS TO MULTIPLY DIGIT BY DIGIT EACH ALIGNED PAIR OF DIGITS OF A MULTIPLICAND BY THE ALIGNED DIGIT OF THE REVERSED MULTIPLIER AT EACH POSITION IN (B) ABOVE; (D) MEANS TO DETERMINE THE LEAST SIGNIFICANT DIGIT OF THE SUM OF THE SUB-PRODUCTS OF THE DIGIT BY DIGIT MULTIPLYING AND ANY CARRY FROM THE PREVIOUS STEP FOR EACH POSITION IN THE SHIFTING OF THE DIGITS; (E) MEANS TO DETERMINE AND TEMPORARILY STORE ANY REMAINING DIGITS AS A CARRY FOR USE IN THE NEXT FOLLOWING SHIFTING STEP;
Claim 2
Independent Claim
183 words
AN APPARATUS FOR OBTAINING A PRODUCT OF A MULTIPLIER AND A MULTIPLICAND WHICH COMPRISES: (A) REVERSING MEANS FOR REVERSING THE ORDER OF THE DIGITS OF THE MULTIPLIER TO OBTAIN A REVERSED MULTIPLIER; (B) MEANS TO SEQUENTIALLY SHIFT THE DIGITS OF THE REVERSED MULTIPLIER WITH RESPECT TO THE MULTIPLICAND FROM A FIRST POSITION IN WHICH THE LEAST SIGNIFICANT DIGIT OF THE MULTIPLICAND IS IN EFFECT, ALIGNED WITH THE LEAST SIGNIFICANT DIGIT OF THE REVERSED MULTIPLIER TO A LAST POSITION WHEREIN THE MOST SIGNIFICANT DIGIT OF THE MULTIPLICAND IS ALIGNED WITH THE MOST SIGNIFICANT DIGIT OF THE REVERSED MULTIPLIER; (C) MEANS TO MULTIPLY DIGIT BY DIGIT EACH ALIGNED PAIR OF DIGITS OF A MULTIPLICAND BY THE ALIGNED DIGIT OF THE REVERSED MULTIPLIER AT EACH POSITION IN (B) ABOVE; (D) MEANS TO DETERMINE THE LEAST SIGNIFICANT DIGIT OF THE SUM OF THE SUB-PRODUCTS OF THE DIGIT BY DIGIT MULTIPLYING AND ANY CARRY FROM THE PREVIOUS STEP FOR EACH POSITION IN THE SHIFTING OF THE DIGITS; (E) MEANS TO DETERMINE AND TEMPORARILY STORE ANY REMAINING DIGITS AS A CARRY FOR USE IN THE NEXT FOLLOWING SHIFTING STEP;
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |