Hajime Ishimaru has been granted 14 US patents while listed as an inventor at Unknown . The first was granted in 1980 and the most recent in April 1998. Hajime Ishimaru ranks #332,869 of 4,157,543 US inventors in our database (top 8.0%). Patent records list Hajime Ishimaru in Ibaraki, JP.
Patents per Year Patents granted per year, 1980 to 1998 Bar chart with a peak of 4 patents in 1986. peak 4 1980: 1 patents 1980 1986: 4 patents 1986 1987: 1 patents 1987 1988: 1 patents 1988 1990: 2 patents 1990 1991: 1 patents 1991 1992: 1 patents 1992 1994: 1 patents 1994 1998: 2 patents 1998
Issued Patents All Time
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Showing 1–14 of 14 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
5737906 Quick pressure reducing apparatus — 1998-04-14
5714272 Heat insulating film — 1998-02-03
5350275 Turbomolecular pump having vanes with ceramic and metallic surfaces — 1994-09-27
5125124 Electrostatic dust collector for use in vacuum system Hiroshi Saeki , Junji Ikeda 1992-06-30
$41,000
5070701 Cooling apparatus Hiroshi Saeki , Junji Ikeda 1991-12-10
$51,000
4969556 Vacuum container Kazuo Miyamoto , Kyozi Ono , Yutaka Mikasa , Hiroshi Takemura 1990-11-13
4941224 Electrostatic dust collector for use in vacuum system Hiroshi Saeki , Junji Ikeda 1990-07-17
$271,000
4782316 Core winding with inorganic insulation between the inner conductor and outer metal sheath Yokichi Domeki , Masanori Nozaki , Masao Tezuka 1988-11-01
4715186 Coolant preservation container Masao Miyamoto , Shojiro Komaki 1987-12-29
4607491 Cooling trap for vacuum Masao Miyamoto , Shojiro Komaki 1986-08-26
4594054 Ion pump Katsuya Narushima , Takashi Momose 1986-06-10
4578973 Process for producing hollow aluminum extrudates for use in a high vacuum environment Shigeru Nishizaki 1986-04-01
4562992 Seal device for gate valve Kenzaburo Sugisaki , Mutsuro Onoda 1986-01-07
4231003 Shield-type coaxial vacuum feedthrough — 1980-10-28
