Robert A. Null
13Patents
10h-index
22Co-inventors
72Inventor score
Filing activity: Mar 20, 1974 → Oct 29, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5298884A | Tamper detection circuit and method for use with wearable transmitter tag | Physics | 111 | Expired |
| US4631073A | Method and apparatus for theadsorptive fractionation of gases | Performing Operations; Transporting | 44 | Expired |
| US4299313A | Mobile luggage case handle assembly | Emerging Cross-Sectional Technologies | 34 | Expired |
| US3944032A | Luggage case construction | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5019056A | Bowel care apparatus | Human Necessities | 31 | Expired |
| US7168475B2 | Shutter-type covering for architectural openings | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4559065A | Twin tower gas fractionation apparatus | Performing Operations; Transporting | 20 | Expired |
| US6901988B2 | Shutter-like covering and hardware for architectural opening | Fixed Constructions | 16 | Expired |
| US5344474A | Gas separation device | Chemistry; Metallurgy | 11 | Expired |
| US4655100A | Rolling element jackscrew | Emerging Cross-Sectional Technologies | 10 | Expired |
| US7114545B2 | Magnetic catch for bottom rails of coverings for architectural openings | Fixed Constructions | 10 | Expired |
| US6808002B2 | Balanced tilt mechanism for a covering for an architectural opening | Fixed Constructions | 3 | Expired |
| USD292310S | Gas fractionator for drying compressed air | General | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.