IIT Research Institute
IIT ResearActive Patents
0
Total Holdings
64
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US4837044A | Rugate optical filter systems | Expired / Lapsed | 1987-01-23 | 1989-06-06 | 6 | Details |
| US4455581A | Self-correcting record-play system and method | Expired / Lapsed | 1981-08-18 | 1984-06-19 | 2 | Details |
| US4140180A | Method for in situ heat processing of hydrocarbonaceous for… | Expired / Lapsed | 1977-08-29 | 1979-02-20 | 50 | Details |
| US3737568A | Video recording system | Expired / Lapsed | 1971-12-13 | 1973-06-05 | 6 | Details |
| US3662405A | Reinforced porous ceramic bone prosthesis | Expired / Lapsed | 1969-03-12 | 1972-05-16 | 2 | Details |
| US3318997A | Video recording and reproducing system with photoconductive… | Expired / Lapsed | 1963-10-07 | 1967-05-09 | 2 | Details |
| US3081200A | Method of applying an oxide coating onto a non-porous refra… | Expired / Lapsed | 1959-04-10 | 1963-03-12 | 2 | Details |
| US3013123A | Electromagnetic playback system | Expired / Lapsed | 1954-03-15 | 1961-12-12 | 0 | Details |
| US2992293A | Method and apparatus for generating two-dimensional density… | Expired / Lapsed | 1958-06-27 | 1961-07-11 | 0 | Details |
| US2918367A | Titanium base alloy | Expired / Lapsed | 1954-10-27 | 1959-12-22 | 2 | Details |
| US2901209A | Container filling machine | Expired / Lapsed | 1956-01-30 | 1959-08-25 | 0 | Details |
| US2873926A | Magnetic tape recording equipment | Expired / Lapsed | 1952-12-12 | 1959-02-17 | 0 | Details |
| US2855464A | Electromagnetic head | Expired / Lapsed | 1952-06-20 | 1958-10-07 | 0 | Details |
| US2849543A | Magnetic playback system | Expired / Lapsed | 1955-06-02 | 1958-08-26 | 0 | Details |
| US2828368A | Magnetic reproduction system | Expired / Lapsed | 1955-05-25 | 1958-03-25 | 0 | Details |
| US2811203A | Method for forming ei lamination for shell-type core | Expired / Lapsed | 1952-05-27 | 1957-10-29 | 0 | Details |
| US2809116A | 2, 4, 6-trinitrobenzoate ester-addition compound indicator | Expired / Lapsed | 1955-10-07 | 1957-10-08 | 1 | Details |
| US2797333A | X-ray source | Expired / Lapsed | 1953-07-24 | 1957-06-25 | 2 | Details |
| US2794165A | Magnetic amplifier | Expired / Lapsed | 1952-08-08 | 1957-05-28 | 0 | Details |
| US2785232A | Electromagnetic head | Expired / Lapsed | 1951-10-02 | 1957-03-12 | 0 | Details |
| US2784259A | Recording and erase head for magnetic recorders | Expired / Lapsed | 1952-12-17 | 1957-03-05 | 0 | Details |
| US2761017A | Protector for magnetic record | Expired / Lapsed | 1951-10-16 | 1956-08-28 | 0 | Details |
| US2748750A | Vibrationless pneumatic impact tool | Expired / Lapsed | 1953-01-13 | 1956-06-05 | 0 | Details |
| US2747027A | Recording apparatus and method for making duplicate magneti… | Expired / Lapsed | 1948-11-05 | 1956-05-22 | 0 | Details |
| US2736776A | Magnetic recorder head assembly | Expired / Lapsed | 1951-06-02 | 1956-02-28 | 0 | Details |
| US2713462A | Tape reel support | Expired / Lapsed | 1949-01-08 | 1955-07-19 | 0 | Details |
| US2713091A | Electromagnetic transducer head | Expired / Lapsed | 1951-06-02 | 1955-07-12 | 0 | Details |
| US2710662A | Sound projection system | Expired / Lapsed | 1948-12-23 | 1955-06-14 | 0 | Details |
| US2702835A | Erase head for magnetic recorder | Expired / Lapsed | 1945-08-25 | 1955-02-22 | 0 | Details |
| US2694656A | Magnetic impulse record member, magnetic material, and meth… | Expired / Lapsed | 1947-07-25 | 1954-11-16 | 1 | Details |
| US2694109A | Combined magnetic transducer head and coupling transformer | Expired / Lapsed | 1951-08-18 | 1954-11-09 | 0 | Details |
| US2654809A | Magnetic sound apparatus | Expired / Lapsed | 1947-08-30 | 1953-10-06 | 0 | Details |
| US2633503A | Automatic stop arrangement for magnetic recorders | Expired / Lapsed | 1949-01-12 | 1953-03-31 | 0 | Details |
| US2628285A | Electromagnetic transducer head | Expired / Lapsed | 1950-01-05 | 1953-02-10 | 0 | Details |
| US2615097A | Device for increasing the effectiveness of the transducing … | Expired / Lapsed | 1949-01-12 | 1952-10-21 | 0 | Details |
| US2611618A | Tape and disk recording and reproducing device | Expired / Lapsed | 1946-06-01 | 1952-09-23 | 0 | Details |
| US2603721A | Magnetic recorder with pressure shoe for record members | Expired / Lapsed | 1947-12-08 | 1952-07-15 | 0 | Details |
| US2587593A | Apparatus for supplying mechanical recording bias to magnet… | Expired / Lapsed | 1946-08-31 | 1952-03-04 | 0 | Details |
| US2585065A | Combined magnetic transducer head and coupling transformer | Expired / Lapsed | 1947-12-24 | 1952-02-12 | 0 | Details |
| US2580208A | Electromagnetic transducer head assembly | Expired / Lapsed | 1947-12-24 | 1951-12-25 | 0 | Details |
| US2566441A | Magnetic record medium and method of making the same | Expired / Lapsed | 1946-04-29 | 1951-09-04 | 1 | Details |
| US2561338A | Binaural magnetic recorder | Expired / Lapsed | 1946-12-31 | 1951-07-24 | 0 | Details |
| US2549771A | Magnetic transducer head | Expired / Lapsed | 1946-08-16 | 1951-04-24 | 0 | Details |
| US2539400A | Electromagnetic transducer head | Expired / Lapsed | 1947-08-30 | 1951-01-30 | 0 | Details |
| US2538405A | Electromagnetic transducer head assembly | Expired / Lapsed | 1948-04-27 | 1951-01-16 | 0 | Details |
| US2496441A | Magnetic recording apparatus | Expired / Lapsed | 1946-03-09 | 1950-02-07 | 0 | Details |
| US2484552A | Magazine for magnetic recording and reproducing devices | Expired / Lapsed | 1944-07-17 | 1949-10-11 | 0 | Details |
| US2481398A | Selector system for magnetic wire reproducers | Expired / Lapsed | 1945-06-29 | 1949-09-06 | 0 | Details |
| US2481393A | Magnetic recording head | Expired / Lapsed | 1945-05-30 | 1949-09-06 | 0 | Details |
| US2481392A | Means for bulk demagnetization | Expired / Lapsed | 1945-03-02 | 1949-09-06 | 0 | Details |
| US2479308A | Magnetic recorder head | Expired / Lapsed | 1945-03-17 | 1949-08-16 | 0 | Details |
| US2466514A | Magnetic recording and reproducing device with means to pre… | Expired / Lapsed | 1944-11-23 | 1949-04-05 | 0 | Details |
| US2457234A | Apparatus for electrolytically determining the thickness of… | Expired / Lapsed | 1943-09-25 | 1948-12-28 | 0 | Details |
| US2457727A | Electrical measuring system | Expired / Lapsed | 1940-09-27 | 1948-12-28 | 0 | Details |
| US2431540A | Magnetic recording head | Expired / Lapsed | 1945-03-02 | 1947-11-25 | 0 | Details |
| US2428449A | Magnetic recording head | Expired / Lapsed | 1945-03-02 | 1947-10-07 | 0 | Details |
| US2412318A | Safety drive, braking, and control mechanism for magnetic r… | Expired / Lapsed | 1942-08-10 | 1946-12-10 | 0 | Details |
| US2351010A | Method of and means for controlling high frequency voltage … | Expired / Lapsed | 1942-12-26 | 1944-06-13 | 0 | Details |
| US2351009A | Combination oscillator coil and erasing head for magnetic r… | Expired / Lapsed | 1942-11-18 | 1944-06-13 | 0 | Details |
| US2351007A | Magnetic recording head | Expired / Lapsed | 1942-08-10 | 1944-06-13 | 0 | Details |
| US2351005A | Magnetic recorder | Expired / Lapsed | 1942-07-27 | 1944-06-13 | 0 | Details |
| US2351006A | Magnetic recording head | Expired / Lapsed | 1942-07-27 | 1944-06-13 | 0 | Details |
| US2351003A | Recording and reproducing of vibrations | Expired / Lapsed | 1940-09-11 | 1944-06-13 | 0 | Details |
| US2292159A | Control apparatus | Expired / Lapsed | 1941-06-28 | 1942-08-04 | 0 | Details |