Hirohisa Ishihara — 11 Patents at Alps Electric Co.

Hirohisa Ishihara has been granted 11 US patents while listed as an inventor at Alps Electric Co.. The first was granted in 2000 and the most recent in May 2011. Hirohisa Ishihara ranks #435,149 of 4,157,543 US inventors in our database (top 10.5%). Patent records list Hirohisa Ishihara in Niigata, JP.

Patents per Year

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
7940497	Magnetic head device having rear positive pressure surface and rear side positive pressure surface	Yasuyuki Kondo, Junsei Ueda	2011-05-10
7145752	Magnetic head apparatus having magnetic head slider and magnetic disk apparatus equipped with magnetic head apparatus	Junsei Ueda, Yasuyuki Kondo, Satoshi Morikawa, Keishi Nakashima	2006-12-05	$788,000
7130154	Magnetic head slider having protrusions provided on the medium-facing surface and manufacturing method therefor	Tomoo Otsuka	2006-10-31	$754,000
6839203	Magnetic head having raised element and magnetic head apparatus using the same	Junsei Ueda, Tomoo Otsuka	2005-01-04	$653,000
6728069	Magnetic head slider having protrusions with high abrasion resistance provided on the medium-facing surface and manufacturing method therefor	Tomoo Otsuka	2004-04-27
6717772	Magnetic head slider having protrusions provided on the medium-facing surface and manufacturing method therefor	Tomoo Otsuka	2004-04-06
6657819	Magnetic head having protrusion on medium opposing surface and magnetic recording apparatus	—	2003-12-02
6639756	Magnetic head having raised element and magnetic head apparatus using the same	Junsei Ueda, Tomoo Otsuka	2003-10-28
6591478	Method of producing magnetic head	Takao Soma, Tadashi Otagiri, Soichiro Matsuzawa	2003-07-15
6172850	Floating type magnetic head with non-magnetic thin film coating pattern to reduce starting friction	—	2001-01-09
6101066	Magnetic head, magnetic recording/reproducing apparatus	Isao Nakabayashi	2000-08-08