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United States of America Design
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Nov 28, 2017
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Oct 9, 2015
filing date -
Apr 10, 2015
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
J C BAMFORD EXCAVATORS LIMITED | UTTOXETER STAFFORDSHIRE ST14 5JP |
International Classification(s)

- 2015 Application Filing Year
- 1503 Class
- 241 Applications Filed
- 241 Patents Issued To-Date
- 100 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Jilbert, Samuel John | Uttoxeter, GB | 48 | 400 |
# of filed Patents : 48 Total Citations : 400 | |||
Payne, Samuel | Uttoxeter, GB | 28 | 335 |
# of filed Patents : 28 Total Citations : 335 | |||
Underhill, Thomas Edward | Rocester, GB | 25 | 290 |
# of filed Patents : 25 Total Citations : 290 |
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Patent Citation Ranking
- 8 Citation Count
- 1503 Class
- 0 % this patent is cited more than
- 8 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 28, 2025 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 28, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text
US Patent No: 8116368
PWM signal generator, PWM signal generating device, and digital amplifier
Abstract
In a full digital amplifier for an audio amplifier or the like, it is possible to suppress the concentration of an electromagnetic noise emission spectrum at a specific frequency. A sampling period variation type digital filter is realized by varying the coefficient of a noise shaping filter for the delta-sigma modulator of the full digital amplifier depending on a sampling period. This allows the variation in the carrier frequency of the pulse width modulation.
Description
Claims
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Legal Events
Date | Code | Event | Description |
---|---|---|---|
Mar 14, 2016 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Feb 14, 2016 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Feb 14, 2016 |
Feb 14, 2016 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Sep 25, 2015 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Feb 14, 2012 | I | Issuance | |
Jul 30, 2009 | P | Published | |
Jan 05, 2009 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YONEYA, AKIHIKO;REEL/FRAME:022198/0241 Owner name: NATIONAL UNIVERSITY CORPORATION, JAPAN Effective Date: Jan 05, 2009 |
Jul 27, 2006 | F | Filing | |
Jul 27, 2006 | PD | Priority Date |

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