G11B 5/73931
Two or more layers, at least one layer being polyester
Official title: {Two or more layers, at least one layer being polyester}
G11B5/73931 (Two or more layers, at least one layer being polyester) appears on 123 US grants and 43 published applications in this corpus.
Search patents in G11B- Granted patents
- 123
- Published applications
- 43
- Assignees
- 26
- Inventors
- 195
- Latest grant
- 28 Nov 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 1 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 4 |
| 2002 | 8 | 7 |
| 2003 | 5 | 5 |
| 2004 | 5 | 2 |
| 2005 | 3 | 10 |
| 2006 | 6 | 1 |
| 2007 | 0 | 0 |
| 2008 | 5 | 0 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 1 | 3 |
| 2012 | 2 | 1 |
| 2013 | 2 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 3 |
| 2022 | 4 | 2 |
| 2023 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Magnetic recording medium28 Nov 2023US 11,830,531 B2Sony Group Corporation
- Polyester composition, polyester film, and magnetic recording medium29 Aug 2023US 11,739,182 B2Toyobo Co., Ltd.
- Magnetic recording medium, magnetic recording/reproducing device, and magnetic recording medium cartridge27 Dec 2022US 11,538,495 B2Sony Group Corporation
- Magnetic recording medium having reinforced substrate11 Oct 2022US 11,468,910 B2Sony Corporation
- Magnetic tape having controlled dimensions, magnetic tape cartridge, and magnetic tape apparatus5 Apr 2022US 11,295,776 B2FUJIFILM Corporation
- Magnetic recording medium20 Apr 2023US 2023/0120213 A1Sony Group Corporation
- Magnetic recording medium, magnetic recording/reproducing device, and magnetic recording medium cartridge23 Jun 2022US 2022/0199115 A1Sony Corporation
- Magnetic recording medium7 Apr 2022US 2022/0108723 A1Sony Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus5 Aug 2021US 2021/0241787 A1FUJIFILM Corporation
- Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus5 Aug 2021US 2021/0241795 A1FUJIFILM Corporation
Most cited
By later US patents
- Polyester film and magnetic recording medium therefrom77US 4,590,119 AToray Industries, Inc. · 1986
- Magnetic recording tape43US 3,958,064 AMinnesota Mining and Manufacturing Company · 1976
- Biaxially oriented laminated film43US 5,069,962 AToray Industries, Inc. · 1991
- Biaxially oriented laminated film42US 5,389,422 AToray Industries, Inc. · 1995
- Composite film and antistatic composite film comprising a swellable inorganic silicate34US 4,786,558 AToray Industries, Inc. · 1988